diff --git a/Makefile b/Makefile
index b1062cd1..d80c6cba 100644
--- a/Makefile
+++ b/Makefile
@@ -48,11 +48,12 @@ ifeq ($(WARNINGS), 1)
 endif
 
 ifeq ($(ALL_WARNINGS), 1)
-	ifneq ($(findstring clang,$(CXX),))
+	ifneq ($(findstring clang,$(CXX)),)
 		# Use clang-specific flag -Weverything
 		CXXFLAGS += -Weverything
 	else
-		@echo Couldn\'t activate all warnings (Unsupported compiler)
+		# This is indented with spaces because otherwise it doesn't compile (make doesn't like tabs there for some reason)
+        $(warning Couldn\'t activate all warnings (Unsupported compiler))
 	endif
 endif