diff --git a/src/OpenFOAM/primitives/functions/DataEntry/Sine/Sine.H b/src/OpenFOAM/primitives/functions/DataEntry/Sine/Sine.H
index fb08268814..1c7d7adb28 100644
--- a/src/OpenFOAM/primitives/functions/DataEntry/Sine/Sine.H
+++ b/src/OpenFOAM/primitives/functions/DataEntry/Sine/Sine.H
@@ -126,7 +126,7 @@ class Sine
         void read(const dictionary& coeffs);
 
         //- Disallow default bitwise assignment
-        void operator===(const Sine<Type>&);
+        void operator=(const Sine<Type>&);
 
 
 public: