diff --git a/src/adapter/ezsp/adapter/ezspAdapter.ts b/src/adapter/ezsp/adapter/ezspAdapter.ts
index 271c310072..f04dde9efe 100644
--- a/src/adapter/ezsp/adapter/ezspAdapter.ts
+++ b/src/adapter/ezsp/adapter/ezspAdapter.ts
@@ -529,10 +529,15 @@ class EZSPAdapter extends Adapter {
         return this.driver.queue.execute<void>(async () => {
             this.checkInterpanLock();
             const ieee = new EmberEUI64(sourceIeeeAddress);
-            const addrmode = (type === 'group') ? 1 : 3;
-            const ieeeDst = (type === 'group') ? destinationAddressOrGroup : 
-                new EmberEUI64(destinationAddressOrGroup as string);
-            if (type !== 'group') {
+            let addrmode, ieeeDst;
+            if (type === 'group') {
+                // 0x01 = 16-bit group address for DstAddr and DstEndpoint not present
+                addrmode = 0x01;
+                ieeeDst = uint16_t.serialize(uint16_t, destinationAddressOrGroup as number);
+            } else {
+                // 0x03 = 64-bit extended address for DstAddr and DstEndpoint present
+                addrmode = 0x03;
+                ieeeDst = new EmberEUI64(destinationAddressOrGroup as string);
                 this.driver.setNode(destinationNetworkAddress, ieeeDst as EmberEUI64);
             }
             await this.driver.zdoRequest(
@@ -551,10 +556,15 @@ class EZSPAdapter extends Adapter {
         return this.driver.queue.execute<void>(async () => {
             this.checkInterpanLock();
             const ieee = new EmberEUI64(sourceIeeeAddress);
-            const addrmode = (type === 'group') ? 1 : 3;
-            const ieeeDst = (type === 'group') ? destinationAddressOrGroup : 
-                new EmberEUI64(destinationAddressOrGroup as string);
-            if (type !== 'group') {
+            let addrmode, ieeeDst;
+            if (type === 'group') {
+                // 0x01 = 16-bit group address for DstAddr and DstEndpoint not present
+                addrmode = 0x01;
+                ieeeDst = uint16_t.serialize(uint16_t, destinationAddressOrGroup as number);
+            } else {
+                // 0x03 = 64-bit extended address for DstAddr and DstEndpoint present
+                addrmode = 0x03;
+                ieeeDst = new EmberEUI64(destinationAddressOrGroup as string);
                 this.driver.setNode(destinationNetworkAddress, ieeeDst as EmberEUI64);
             }
             await this.driver.zdoRequest(