diff --git a/pigpio.c b/pigpio.c
index 81af8af..7c130e5 100644
--- a/pigpio.c
+++ b/pigpio.c
@@ -13380,7 +13380,7 @@ int gpioCfgInterfaces(unsigned ifFlags)
 
    CHECK_NOT_INITED;
 
-   if (ifFlags > 7)
+   if (ifFlags > 15)
       SOFT_ERROR(PI_BAD_IF_FLAGS, "bad ifFlags (%X)", ifFlags);
 
    gpioCfg.ifFlags = ifFlags;