diff --git a/checks.c b/checks.c
index 3bf0fa4a..e81a8c74 100644
--- a/checks.c
+++ b/checks.c
@@ -113,6 +113,7 @@ static inline void check_msg(struct check *c, const char *fmt, ...)
 		vfprintf(stderr, fmt, ap);
 		fprintf(stderr, "\n");
 	}
+	va_end(ap);
 }
 
 #define FAIL(c, ...) \
diff --git a/util.h b/util.h
index ccfdf4b1..f800b601 100644
--- a/util.h
+++ b/util.h
@@ -34,6 +34,7 @@ static inline void __attribute__((noreturn)) die(const char *str, ...)
 	va_start(ap, str);
 	fprintf(stderr, "FATAL ERROR: ");
 	vfprintf(stderr, str, ap);
+	va_end(ap);
 	exit(1);
 }