diff --git a/src/eap_peer/eap_aka.c b/src/eap_peer/eap_aka.c
index 0662ae738..dc9e8cc34 100644
--- a/src/eap_peer/eap_aka.c
+++ b/src/eap_peer/eap_aka.c
@@ -1296,7 +1296,7 @@ static struct wpabuf * eap_aka_process(struct eap_sm *sm, void *priv,
 
 	pos = eap_hdr_validate(EAP_VENDOR_IETF, data->eap_method, reqData,
 			       &len);
-	if (pos == NULL || len < 1) {
+	if (pos == NULL || len < 3) {
 		ret->ignore = TRUE;
 		return NULL;
 	}
diff --git a/src/eap_peer/eap_sim.c b/src/eap_peer/eap_sim.c
index bd06df78d..99a2816ce 100644
--- a/src/eap_peer/eap_sim.c
+++ b/src/eap_peer/eap_sim.c
@@ -1042,7 +1042,7 @@ static struct wpabuf * eap_sim_process(struct eap_sm *sm, void *priv,
 	}
 
 	pos = eap_hdr_validate(EAP_VENDOR_IETF, EAP_TYPE_SIM, reqData, &len);
-	if (pos == NULL || len < 1) {
+	if (pos == NULL || len < 3) {
 		ret->ignore = TRUE;
 		return NULL;
 	}