diff --git a/IODevice.cpp b/IODevice.cpp
index f76bbb0..3b6094b 100644
--- a/IODevice.cpp
+++ b/IODevice.cpp
@@ -294,7 +294,7 @@ bool IODevice::checkNoOverlap(VPIN firstPin, uint8_t nPins, uint8_t i2cAddress)
     } 
   
     // Check for overlapping I2C address
-    if (dev->_matchI2CAddress(i2cAddress)) {
+    if (i2cAddress && dev->_I2CAddress==i2cAddress) {
       DIAG(F("WARNING HAL Overlap. i2c Addr 0x%x ignored."),i2cAddress);
       return false;
     } 
@@ -302,9 +302,6 @@ bool IODevice::checkNoOverlap(VPIN firstPin, uint8_t nPins, uint8_t i2cAddress)
   return true;  // no overlaps... OK to go on with constructor
 }
   
-bool IODevice::_matchI2CAddress(uint8_t i2cAddress)  {
-    return (i2cAddress && i2cAddress==_I2CAddress);
-  }
 
 //==================================================================================================================
 // Static data
diff --git a/IODevice.h b/IODevice.h
index 07a632a..8b786c4 100644
--- a/IODevice.h
+++ b/IODevice.h
@@ -228,9 +228,6 @@ protected:
   // Pin number of interrupt pin for GPIO extender devices.  The extender module will pull this
   //  pin low if an input changes state.
   int16_t _gpioInterruptPin = -1;
-
-  // non-i2c hal drivers return false, i2c drivers override this in IO_GPIOBase
-  bool _matchI2CAddress(uint8_t i2cAddress);
     
   // Method to check if pins will overlap before creating new device. 
   static bool checkNoOverlap(VPIN firstPin, uint8_t nPins=1, uint8_t i2cAddress=0);
diff --git a/IO_HCSR04.h b/IO_HCSR04.h
index 5b9b169..d56dda3 100644
--- a/IO_HCSR04.h
+++ b/IO_HCSR04.h
@@ -76,7 +76,7 @@ public:
  
   // Static create function provides alternative way to create object
   static void create(VPIN vpin, int trigPin, int echoPin, uint16_t onThreshold, uint16_t offThreshold) {
-    if (checkNoOverlap(vpin) && checkNoOverlap(trigPin) && checkNoOverlap(echoPin))
+    if (checkNoOverlap(vpin))
         new HCSR04(vpin, trigPin, echoPin, onThreshold, offThreshold);
   }