diff --git a/dlls/snmpapi/main.c b/dlls/snmpapi/main.c
index 0e60d88e7fe..9e14a194876 100644
--- a/dlls/snmpapi/main.c
+++ b/dlls/snmpapi/main.c
@@ -356,6 +356,7 @@ INT WINAPI SnmpUtilOidNCmp(AsnObjectIdentifier *oid1, AsnObjectIdentifier *oid2,
         if (oid1->ids[i] > oid2->ids[i]) return 1;
         if (oid1->ids[i] < oid2->ids[i]) return -1;
     }
+    if (i == count) return 0;
     if (oid1->idLength < oid2->idLength) return -1;
     if (oid1->idLength > oid2->idLength) return 1;
     return 0;
diff --git a/dlls/snmpapi/tests/util.c b/dlls/snmpapi/tests/util.c
index 3d513bd9349..428040d4066 100644
--- a/dlls/snmpapi/tests/util.c
+++ b/dlls/snmpapi/tests/util.c
@@ -330,6 +330,11 @@ static void test_SnmpUtilOidNCmp(void)
     ok(ret == 1, "SnmpUtilOidNCmp failed: %d\n", ret);
     ret = SnmpUtilOidNCmp(&oid1, &oid2, 4);
     ok(ret == -1, "SnmpUtilOidNCmp failed: %d\n", ret);
+
+    ret = SnmpUtilOidNCmp(&oid1, &oid2, 2);
+    ok(!ret, "SnmpUtilOidNCmp failed: %d\n", ret);
+    ret = SnmpUtilOidNCmp(&oid2, &oid1, 2);
+    ok(!ret, "SnmpUtilOidNCmp failed: %d\n", ret);
 }
 
 static void test_SnmpUtilOidCmp(void)