diff --git a/radio/src/gui/gui_common.cpp b/radio/src/gui/gui_common.cpp
index 821558035..8788bc903 100644
--- a/radio/src/gui/gui_common.cpp
+++ b/radio/src/gui/gui_common.cpp
@@ -540,6 +540,11 @@ bool isPxx2IsrmChannelsCountAllowed(int channels)
   else
     return (channels % 8 == 0);
 }
+#else
+bool isPxx2IsrmChannelsCountAllowed(int channels)
+{
+  return true;
+}
 #endif
 
 bool isModuleUSingSport(uint8_t moduleBay, uint8_t moduleType)