diff --git a/src/CLR/CorLib/corlib_native_System_Math.cpp b/src/CLR/CorLib/corlib_native_System_Math.cpp
index d603d94360..8d4a45943f 100644
--- a/src/CLR/CorLib/corlib_native_System_Math.cpp
+++ b/src/CLR/CorLib/corlib_native_System_Math.cpp
@@ -989,9 +989,9 @@
 
         float d = stack.Arg0().NumericByRefConst().r4;
         float res = 0.0;
-        float retVal = modff(d, &res); 
+        modff(d, &res); 
 
-        stack.SetResult_R4( retVal );
+        stack.SetResult_R4( res );
 
         NANOCLR_NOCLEANUP_NOLABEL();