diff --git a/src/stdlib/SDL_string.c b/src/stdlib/SDL_string.c
index ab6e947591..67b376e2c5 100644
--- a/src/stdlib/SDL_string.c
+++ b/src/stdlib/SDL_string.c
@@ -932,7 +932,7 @@ int SDL_atoi(const char *string)
 #ifdef HAVE_ATOI
     return atoi(string);
 #else
-    return SDL_strtol(string, NULL, 0);
+    return SDL_strtol(string, NULL, 10);
 #endif /* HAVE_ATOI */
 }