diff --git a/std/experimental/logger/core.d b/std/experimental/logger/core.d
index c371d2580..fbe69da79 100644
--- a/std/experimental/logger/core.d
+++ b/std/experimental/logger/core.d
@@ -201,7 +201,7 @@ log(LogLevel.warning, true, "Hello World", 3.1415);
 void log(int line = __LINE__, string file = __FILE__,
     string funcName = __FUNCTION__, string prettyFuncName = __PRETTY_FUNCTION__,
     string moduleName = __MODULE__, A...)(const LogLevel ll,
-    lazy bool condition, lazy A args) @safe
+    lazy bool condition, lazy A args)
     if (args.length != 1)
 {
     static if (isLoggingActive)
@@ -479,7 +479,7 @@ template defaultLogFunction(LogLevel ll)
     void defaultLogFunction(int line = __LINE__, string file = __FILE__,
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
-        string moduleName = __MODULE__, A...)(lazy A args) @safe
+        string moduleName = __MODULE__, A...)(lazy A args)
         if ((args.length > 0 && !is(Unqual!(A[0]) : bool)) || args.length == 0)
     {
         static if (isLoggingActiveAt!ll && ll >= moduleLogLevel!moduleName)
@@ -493,7 +493,6 @@ template defaultLogFunction(LogLevel ll)
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(lazy bool condition, lazy A args)
-        @safe
     {
         static if (isLoggingActiveAt!ll && ll >= moduleLogLevel!moduleName)
         {
@@ -555,7 +554,6 @@ template defaultLogFunctionf(LogLevel ll)
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(lazy string msg, lazy A args)
-        @safe
     {
         static if (isLoggingActiveAt!ll && ll >= moduleLogLevel!moduleName)
         {
@@ -568,7 +566,7 @@ template defaultLogFunctionf(LogLevel ll)
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(lazy bool condition,
-            lazy string msg, lazy A args) @safe
+            lazy string msg, lazy A args)
     {
         static if (isLoggingActiveAt!ll && ll >= moduleLogLevel!moduleName)
         {
@@ -997,7 +995,7 @@ abstract class Logger
             string funcName = __FUNCTION__,
             string prettyFuncName = __PRETTY_FUNCTION__,
             string moduleName = __MODULE__, A...)(lazy bool condition,
-                lazy A args) @safe
+                lazy A args)
         {
             static if (isLoggingActiveAt!ll && ll >= moduleLogLevel!moduleName)
                 synchronized (mutex)
@@ -1046,7 +1044,7 @@ abstract class Logger
             string funcName = __FUNCTION__,
             string prettyFuncName = __PRETTY_FUNCTION__,
             string moduleName = __MODULE__, A...)(lazy bool condition,
-                lazy string msg, lazy A args) @safe
+                lazy string msg, lazy A args)
         {
             static if (isLoggingActiveAt!ll && ll >= moduleLogLevel!moduleName)
                 synchronized (mutex)
@@ -1093,7 +1091,6 @@ abstract class Logger
             string funcName = __FUNCTION__,
             string prettyFuncName = __PRETTY_FUNCTION__,
             string moduleName = __MODULE__, A...)(lazy string msg, lazy A args)
-            @safe
         {
             static if (isLoggingActiveAt!ll && ll >= moduleLogLevel!moduleName)
                 synchronized (mutex)
@@ -1163,7 +1160,7 @@ abstract class Logger
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(const LogLevel ll,
-        lazy bool condition, lazy A args) @safe
+        lazy bool condition, lazy A args)
         if (args.length != 1)
     {
         static if (isLoggingActive) synchronized (mutex)
@@ -1188,7 +1185,7 @@ abstract class Logger
     final void log(T, string moduleName = __MODULE__)(const LogLevel ll,
         lazy bool condition, lazy T args, int line = __LINE__,
         string file = __FILE__, string funcName = __FUNCTION__,
-        string prettyFuncName = __PRETTY_FUNCTION__) @safe
+        string prettyFuncName = __PRETTY_FUNCTION__)
     {
         static if (isLoggingActive) synchronized (mutex)
         {
@@ -1233,7 +1230,6 @@ abstract class Logger
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(const LogLevel ll, lazy A args)
-        @safe
         if ((args.length > 1 && !is(Unqual!(A[0]) : bool)) || args.length == 0)
     {
         static if (isLoggingActive) synchronized (mutex)
@@ -1258,7 +1254,7 @@ abstract class Logger
     final void log(T)(const LogLevel ll, lazy T args, int line = __LINE__,
         string file = __FILE__, string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
-        string moduleName = __MODULE__) @safe
+        string moduleName = __MODULE__)
     {
         static if (isLoggingActive) synchronized (mutex)
         {
@@ -1303,7 +1299,6 @@ abstract class Logger
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(lazy bool condition, lazy A args)
-        @safe
         if (args.length != 1)
     {
         static if (isLoggingActive) synchronized (mutex)
@@ -1329,7 +1324,7 @@ abstract class Logger
     final void log(T)(lazy bool condition, lazy T args, int line = __LINE__,
         string file = __FILE__, string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
-        string moduleName = __MODULE__) @safe
+        string moduleName = __MODULE__)
     {
         static if (isLoggingActive) synchronized (mutex)
         {
@@ -1373,7 +1368,6 @@ abstract class Logger
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(lazy A args)
-        @safe
         if ((args.length > 1
                 && !is(Unqual!(A[0]) : bool)
                 && !is(Unqual!(A[0]) == LogLevel))
@@ -1401,7 +1395,7 @@ abstract class Logger
     final void log(T)(lazy T arg, int line = __LINE__, string file = __FILE__,
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
-        string moduleName = __MODULE__) @safe
+        string moduleName = __MODULE__)
     {
         static if (isLoggingActive) synchronized (mutex)
         {
@@ -1448,7 +1442,7 @@ abstract class Logger
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(const LogLevel ll,
-        lazy bool condition, lazy string msg, lazy A args) @safe
+        lazy bool condition, lazy string msg, lazy A args)
     {
         static if (isLoggingActive) synchronized (mutex)
         {
@@ -1494,7 +1488,7 @@ abstract class Logger
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(const LogLevel ll,
-            lazy string msg, lazy A args) @safe
+            lazy string msg, lazy A args)
     {
         static if (isLoggingActive) synchronized (mutex)
         {
@@ -1541,7 +1535,7 @@ abstract class Logger
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(lazy bool condition,
-            lazy string msg, lazy A args) @safe
+            lazy string msg, lazy A args)
     {
         static if (isLoggingActive) synchronized (mutex)
         {
@@ -1588,7 +1582,6 @@ abstract class Logger
         string funcName = __FUNCTION__,
         string prettyFuncName = __PRETTY_FUNCTION__,
         string moduleName = __MODULE__, A...)(lazy string msg, lazy A args)
-        @safe
     {
         static if (isLoggingActive) synchronized (mutex)
         {
@@ -3052,3 +3045,22 @@ unittest
     l.infof("log: %s", a);
     assert(l.msg == "log: 1");
 }
+
+// Ensure @system toString methods work
+unittest
+{
+    enum SystemToStringMsg = "SystemToString";
+    static struct SystemToString
+    {
+        string toString() @system
+        {
+            return SystemToStringMsg;
+        }
+    }
+
+    auto tl = new TestLogger();
+
+    SystemToString sts;
+    tl.logf("%s", sts);
+    assert(tl.msg == SystemToStringMsg);
+}