diff --git a/src/util/tests/process_test.c b/src/util/tests/process_test.c
index 4a7c7cbd4e3..dd4e7bf8c7a 100644
--- a/src/util/tests/process_test.c
+++ b/src/util/tests/process_test.c
@@ -36,7 +36,7 @@
 #define PATH_MAX MAX_PATH
 #endif
 
-bool error = false;
+static bool error = false;
 
 static void
 expect_equal_str(const char *expected, const char *actual, const char *test)