diff --git a/src/hostapi/coreaudio/pa_mac_core_utilities.c b/src/hostapi/coreaudio/pa_mac_core_utilities.c
index c42f902..63e616f 100644
--- a/src/hostapi/coreaudio/pa_mac_core_utilities.c
+++ b/src/hostapi/coreaudio/pa_mac_core_utilities.c
@@ -528,9 +528,6 @@ PaError setBestFramesPerBuffer( const AudioDeviceID device,
     const bool isInput = !isOutput;
     UInt32 propsize = sizeof(UInt32);
     OSErr err;
-    Float64 min  = -1; /*the min blocksize*/
-    Float64 best = -1; /*the best blocksize*/
-    int i=0;
     AudioValueRange range;
 
     if( actualFramesPerBuffer == NULL )