diff --git a/src/main.c b/src/main.c
index 23af678..ac840d6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -454,21 +454,25 @@ static bool parse_config_int(GKeyFile *config, const char *group,
 	tmp = strtol(str, &endptr, 0);
 	if (!endptr || *endptr != '\0') {
 		error("%s.%s = %s is not integer", group, key, str);
+		g_free(str);
 		return false;
 	}
 
 	if (tmp < min) {
+		g_free(str);
 		warn("%s.%s = %zu is out of range (< %zu)", group, key, tmp,
 									min);
 		return false;
 	}
 
 	if (tmp > max) {
+		g_free(str);
 		warn("%s.%s = %zu is out of range (> %zu)", group, key, tmp,
 									max);
 		return false;
 	}
 
+	g_free(str);
 	if (val)
 		*val = tmp;