diff --git a/libraries/SrcWrapper/src/HardwareTimer.cpp b/libraries/SrcWrapper/src/HardwareTimer.cpp
index f65a4f4f13..304b169c92 100644
--- a/libraries/SrcWrapper/src/HardwareTimer.cpp
+++ b/libraries/SrcWrapper/src/HardwareTimer.cpp
@@ -168,6 +168,10 @@ void HardwareTimer::pause()
   */
 void HardwareTimer::pauseChannel(uint32_t channel)
 {
+  if ((channel < 1) || (channel > TIMER_CHANNELS)) {
+    return;
+  }
+
   int timAssociatedInputChannel;
   int LLChannel = getLLChannel(channel);
   if (LLChannel == -1) {