diff --git a/test/testautomation_stdlib.c b/test/testautomation_stdlib.c
index b21dac50d0..d49da29c7e 100644
--- a/test/testautomation_stdlib.c
+++ b/test/testautomation_stdlib.c
@@ -1336,8 +1336,8 @@ static int SDLCALL stdlib_strtox(void *arg)
         STRTOX_TEST_CASE(SDL_strtol, long, "%ld", "-2147483649", 10, -2147483647L - 1, 11);
         STRTOX_TEST_CASE(SDL_strtol, long, "%ld", "-9999999999999999999999999999999999999999", 10, -2147483647L - 1, 41);
 
-        STRTOX_TEST_CASE(SDL_strtoul, unsigned long, "%lu", "4294967295", 10, 4294967295, 10);
-        STRTOX_TEST_CASE(SDL_strtoul, unsigned long, "%lu", "4294967296", 10, 4294967295, 10);
+        STRTOX_TEST_CASE(SDL_strtoul, unsigned long, "%lu", "4294967295", 10, 4294967295UL, 10);
+        STRTOX_TEST_CASE(SDL_strtoul, unsigned long, "%lu", "4294967296", 10, 4294967295UL, 10);
         STRTOX_TEST_CASE(SDL_strtoul, unsigned long, "%lu", "-4294967295", 10, 1, 11);
     }