diff --git a/Modules/CheckStructHasMember.cmake b/Modules/CheckStructHasMember.cmake
index de31d2ce2..6c1520592 100644
--- a/Modules/CheckStructHasMember.cmake
+++ b/Modules/CheckStructHasMember.cmake
@@ -69,7 +69,7 @@ macro (CHECK_STRUCT_HAS_MEMBER _STRUCT _MEMBER _HEADER _RESULT)
 ${_INCLUDE_FILES}
 int main()
 {
-   (void)((${_STRUCT} *)0)->${_MEMBER};
+   (void)sizeof(((${_STRUCT} *)0)->${_MEMBER});
    return 0;
 }
 ")