diff --git a/common/JackNetDriver.cpp b/common/JackNetDriver.cpp
index 38fe48e7..f8601f4b 100644
--- a/common/JackNetDriver.cpp
+++ b/common/JackNetDriver.cpp
@@ -576,7 +576,7 @@ namespace Jack
         for (int audio_port_index = 0; audio_port_index < fPlaybackChannels; audio_port_index++) {
         #ifdef OPTIMIZED_PROTOCOL
             // Port is connected on other side...
-            if ((long)fNetAudioPlaybackBuffer->GetBuffer(audio_port_index) == -1) {
+            if ((uintptr_t)fNetAudioPlaybackBuffer->GetBuffer(audio_port_index) == -1) {
                 fNetAudioPlaybackBuffer->SetBuffer(audio_port_index, GetOutputBuffer(audio_port_index, true));
             } else {
                 fNetAudioPlaybackBuffer->SetBuffer(audio_port_index, NULL);
diff --git a/common/JackNetManager.cpp b/common/JackNetManager.cpp
index 7601acdd..4a4a8167 100644
--- a/common/JackNetManager.cpp
+++ b/common/JackNetManager.cpp
@@ -431,7 +431,7 @@ namespace Jack
         for (int audio_port_index = 0; audio_port_index < fParams.fSendAudioChannels; audio_port_index++) {
 
         #ifdef OPTIMIZED_PROTOCOL
-            if ((long)fNetAudioCaptureBuffer->GetBuffer(audio_port_index) == -1) {
+            if ((uintptr_t)fNetAudioCaptureBuffer->GetBuffer(audio_port_index) == -1) {
                 // Port is connected on other side...
                 fNetAudioCaptureBuffer->SetBuffer(audio_port_index,
                                                 static_cast<sample_t*>(jack_port_get_buffer_nulled(fAudioCapturePorts[audio_port_index],