diff --git a/Multiprotocol/Validate.h b/Multiprotocol/Validate.h
index b7a2102..214c4f5 100644
--- a/Multiprotocol/Validate.h
+++ b/Multiprotocol/Validate.h
@@ -359,7 +359,7 @@
 #if not defined(STM32_BOARD)
 	#undef SX1276_INSTALLED
 #endif
-#ifndef SX1276_INSTALLED || defined MULTI_EU
+#if not defined(SX1276_INSTALLED) || defined MULTI_EU
 	#undef FRSKYR9_SX1276_INO
 #endif