diff --git a/builder/data/usr/bin/pwnlib b/builder/data/usr/bin/pwnlib
index 23827206..4e78adf6 100755
--- a/builder/data/usr/bin/pwnlib
+++ b/builder/data/usr/bin/pwnlib
@@ -79,12 +79,12 @@ is_auto_mode() {
 
   # if usb0 is up, we're in MANU
   if is_interface_up usb0; then
-    return 1
+    return 0
   fi
 
   # if eth0 is up (for other boards), we're in MANU
   if is_interface_up eth0; then
-    return 1
+    return 0
   fi
 
   # no override, but none of the interfaces is up -> AUTO
@@ -105,12 +105,12 @@ is_auto_mode_no_delete() {
 
   # if usb0 is up, we're in MANU
   if is_interface_up usb0; then
-    return 1
+    return 0
   fi
 
   # if eth0 is up (for other boards), we're in MANU
   if is_interface_up eth0; then
-    return 1
+    return 0
   fi
 
   # no override, but none of the interfaces is up -> AUTO