diff --git a/src/dfmt.d b/src/dfmt.d
index ae8dc75..c2c0f91 100644
--- a/src/dfmt.d
+++ b/src/dfmt.d
@@ -403,7 +403,8 @@ private:
         else if (current.type == tok!"identifier")
         {
             writeToken();
-            if (current.type == tok!"identifier" || isKeyword(current.type))
+            if (current.type == tok!"identifier" || isKeyword(current.type)
+                || current.type == tok!"@")
                 write(" ");
         }
         else
diff --git a/tests/heronian.d.ref b/tests/heronian.d.ref
index f7334ff..d9c6d46 100644
--- a/tests/heronian.d.ref
+++ b/tests/heronian.d.ref
@@ -1,7 +1,7 @@
 import std.stdio, std.math, std.range, std.algorithm, std.numeric, std.traits,
     std.typecons;
 
-double hero(in uint a, in uint b, in uint c) pure nothrow @safe@nogc
+double hero(in uint a, in uint b, in uint c) pure nothrow @safe @nogc
 {
     immutable s = (a + b + c) / 2.0;
     immutable a2 = s * (s - a) * (s - b) * (s - c);