diff --git a/Makefile b/Makefile
index 2e81dfc..7521a43 100644
--- a/Makefile
+++ b/Makefile
@@ -153,7 +153,7 @@ debug: linty
 
 CSUPPRESSIONS = --suppress=missingIncludeSystem --suppress=invalidscanf
 cppcheck:
-	cppcheck -I. --template gcc --enable=all $(CSUPPRESSIONS) *.[ch]
+	cppcheck -I. --template gcc -UPROP_SET_SEEN --enable=all $(CSUPPRESSIONS) *.[ch]
 
 pylint:
 	@pylint --score=n *.py */*.py