diff --git a/interface/src/Util.cpp b/interface/src/Util.cpp
index c2f24cd194..958fc02640 100644
--- a/interface/src/Util.cpp
+++ b/interface/src/Util.cpp
@@ -26,9 +26,9 @@
 #include "Util.h"
 
 #ifdef _WIN32
-bool isnan(double value) { return _isnan(value); }
+int isnan(double value) { return _isnan(value); }
 #else
-bool isnan(double value) { return std::isnan(value); }
+int isnan(double value) { return std::isnan(value); }
 #endif
 
 using namespace std;
diff --git a/libraries/audio/src/PositionalAudioRingBuffer.cpp b/libraries/audio/src/PositionalAudioRingBuffer.cpp
index ae71ca0151..f1eba07906 100644
--- a/libraries/audio/src/PositionalAudioRingBuffer.cpp
+++ b/libraries/audio/src/PositionalAudioRingBuffer.cpp
@@ -15,9 +15,9 @@
 #include "PositionalAudioRingBuffer.h"
 
 #ifdef _WIN32
-bool isnan(double value) { return _isnan(value); }
+int isnan(double value) { return _isnan(value); }
 #else
-bool isnan(double value) { return std::isnan(value); }
+int isnan(double value) { return std::isnan(value); }
 #endif
 
 PositionalAudioRingBuffer::PositionalAudioRingBuffer(PositionalAudioRingBuffer::Type type) :