diff --git a/compiler/src/dmd/mustuse.d b/compiler/src/dmd/mustuse.d
index 4eb422805d..369d60e208 100644
--- a/compiler/src/dmd/mustuse.d
+++ b/compiler/src/dmd/mustuse.d
@@ -98,7 +98,7 @@ void checkMustUseReserved(Dsymbol sym)
  */
 private bool isAssignment(Expression e)
 {
-    if (e.isAssignExp || e.isBinAssignExp)
+    if (e.isAssignExp || e.isBinAssignExp || e.isConstructExp || e.isBlitExp)
         return true;
     if (auto ce = e.isCallExp())
     {
diff --git a/compiler/test/compilable/must_use_initialize.d b/compiler/test/compilable/must_use_initialize.d
new file mode 100644
index 0000000000..8caec434bd
--- /dev/null
+++ b/compiler/test/compilable/must_use_initialize.d
@@ -0,0 +1,16 @@
+// https://issues.dlang.org/show_bug.cgi?id=23236
+// can't initialize a @mustuse member in constructor
+
+import core.attribute;
+
+@mustuse struct MyError { }
+
+struct S
+{
+    MyError lastError;
+
+    this(int x)
+    {
+        this.lastError = MyError();
+    }
+}