diff --git a/src/common/va_copy.h b/src/common/va_copy.h
index 7e0ded6bb..ae7250ff3 100644
--- a/src/common/va_copy.h
+++ b/src/common/va_copy.h
@@ -60,7 +60,7 @@
 
 /* If we don't have va_copy now, use a generic version */
 #if !defined(va_copy)
-#define va_copy(dest,src)       ((src)=(dest))
+#define va_copy(dest,src)       ((dest)=(src))
 #endif