diff --git a/src/xpdev/threadwrap.h b/src/xpdev/threadwrap.h
index 0b5d520cb097b77cb2257b90e6f8996e0d0b1501..71e9c63dd22dd83415013b17270a5c4648bf42b9 100644
--- a/src/xpdev/threadwrap.h
+++ b/src/xpdev/threadwrap.h
@@ -75,7 +75,7 @@ extern "C" {
 
 #else
 
-	#warning "Need semaphore wrappers."
+	#error "Need semaphore wrappers."
 
 #endif