1 files changed, 1 insertions, 1 deletions
diff --git a/net.c b/net.c
index f4c313084b..10d23b41f6 100644
--- a/net.c
+++ b/net.c
@@ -668,7 +668,7 @@ int tap_alloc(char *dev, size_t dev_size)
 
     if( *dev ){
        ptr = dev;
-       while( *ptr && !isdigit((int)*ptr) ) ptr++;
+       while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++;
        ppa = atoi(ptr);
     }