diff --git a/tests/internal/config_map.c b/tests/internal/config_map.c
index b709d016d17..687e2313ac6 100644
--- a/tests/internal/config_map.c
+++ b/tests/internal/config_map.c
@@ -14,7 +14,7 @@ struct context {
     int num_int;
     size_t size;
     time_t time;
-    char boolean;
+    int boolean;
     double num_double;
     flb_sds_t string;
     struct mk_list *list1;