diff --git a/examples/CC1101/CC1101_Receive_Interrupt/CC1101_Receive_Interrupt.ino b/examples/CC1101/CC1101_Receive_Interrupt/CC1101_Receive_Interrupt.ino
index e52630a5..65ae79a2 100644
--- a/examples/CC1101/CC1101_Receive_Interrupt/CC1101_Receive_Interrupt.ino
+++ b/examples/CC1101/CC1101_Receive_Interrupt/CC1101_Receive_Interrupt.ino
@@ -82,6 +82,9 @@ volatile bool enableInterrupt = true;
 // is received by the module
 // IMPORTANT: this function MUST be 'void' type
 //            and MUST NOT have any arguments!
+#if defined(ESP8266) || defined(ESP32)
+  ICACHE_RAM_ATTR
+#endif
 void setFlag(void) {
   // check if the interrupt is enabled
   if(!enableInterrupt) {
diff --git a/examples/CC1101/CC1101_Transmit_Interrupt/CC1101_Transmit_Interrupt.ino b/examples/CC1101/CC1101_Transmit_Interrupt/CC1101_Transmit_Interrupt.ino
index 29719ade..1d993a77 100644
--- a/examples/CC1101/CC1101_Transmit_Interrupt/CC1101_Transmit_Interrupt.ino
+++ b/examples/CC1101/CC1101_Transmit_Interrupt/CC1101_Transmit_Interrupt.ino
@@ -75,6 +75,9 @@ volatile bool enableInterrupt = true;
 // is transmitted by the module
 // IMPORTANT: this function MUST be 'void' type
 //            and MUST NOT have any arguments!
+#if defined(ESP8266) || defined(ESP32)
+  ICACHE_RAM_ATTR
+#endif
 void setFlag(void) {
   // check if the interrupt is enabled
   if(!enableInterrupt) {