diff --git a/ext/simplexml/config.w32 b/ext/simplexml/config.w32
index 979f52281af..94546302e30 100644
--- a/ext/simplexml/config.w32
+++ b/ext/simplexml/config.w32
@@ -15,7 +15,7 @@ if (PHP_SIMPLEXML == "yes") {
 		}
 		ADD_FLAG("CFLAGS_SIMPLEXML", "/D PHP_SIMPLEXML_EXPORTS ");
 	} else {
-		PHP_SIMPLEXML == "no";
+		PHP_SIMPLEXML = "no";
 		WARNING("simplexml not enabled; libraries and headers not found");
 	}
 }