diff --git a/wpa_supplicant/config_file.c b/wpa_supplicant/config_file.c
index 98e35915c..22b1665f7 100644
--- a/wpa_supplicant/config_file.c
+++ b/wpa_supplicant/config_file.c
@@ -1269,7 +1269,7 @@ static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 	if (config->sae_groups) {
 		int i;
 		fprintf(f, "sae_groups=");
-		for (i = 0; config->sae_groups[i] >= 0; i++) {
+		for (i = 0; config->sae_groups[i] > 0; i++) {
 			fprintf(f, "%s%d", i > 0 ? " " : "",
 				config->sae_groups[i]);
 		}