diff --git a/src/frsky.cpp b/src/frsky.cpp
index 8ea89b40a..fd0118fb1 100644
--- a/src/frsky.cpp
+++ b/src/frsky.cpp
@@ -791,11 +791,12 @@ void FrskyValueWithMinMax::set(uint8_t value, uint8_t unit)
 
 void frskyEvalCurrentConsumptionBoundary()
 {
-  if (g_model.frsky.currentSource == CURRENT_SOURCE_HUB) {
-    currentConsumptionBoundary = 3600;
-  }
-  else {
-    currentConsumptionBoundary = 360000L / (g_model.frsky.channels[g_model.frsky.currentSource-1].ratio << g_model.frsky.channels[g_model.frsky.currentSource-1].multiplier);
+  currentConsumptionBoundary = 3600;
+  if (g_model.frsky.currentSource > CURRENT_SOURCE_HUB) {
+    uint16_t divider = (g_model.frsky.channels[g_model.frsky.currentSource-1].ratio << g_model.frsky.channels[g_model.frsky.currentSource-1].multiplier);
+    if (divider > 5) {
+      currentConsumptionBoundary = 360000L / divider;
+    }
   }
 }