diff --git a/include/bx/error.h b/include/bx/error.h
index 47d6d82..f693b65 100644
--- a/include/bx/error.h
+++ b/include/bx/error.h
@@ -11,7 +11,7 @@
 #define BX_ERROR_SET(_ptr, _result, _msg) \
 			BX_MACRO_BLOCK_BEGIN \
 				BX_TRACE("Error %d: %s", _result.code, "" _msg); \
-				_ptr->setError(_result,  "" _msg); \
+				(_ptr)->setError(_result,  "" _msg); \
 			BX_MACRO_BLOCK_END
 
 #define BX_ERROR_USE_TEMP_WHEN_NULL(_ptr) \