diff --git a/src/tests/eventHandler/Makefile b/src/tests/eventHandler/Makefile
index e42e4ca4..5c96065e 100644
--- a/src/tests/eventHandler/Makefile
+++ b/src/tests/eventHandler/Makefile
@@ -28,7 +28,7 @@ endif
 ifeq ($(OSTYPE),Linux-gnu)
 OS = LINUX
 endif
-ifeq ($(OSTYPE),darwin)
+ifeq ($(OSTYPE),Darwin)
 OS = DARWIN
 endif