diff --git a/source/SoundTouch/FIRFilter.cpp b/source/SoundTouch/FIRFilter.cpp
index 27b4362..6656a58 100644
--- a/source/SoundTouch/FIRFilter.cpp
+++ b/source/SoundTouch/FIRFilter.cpp
@@ -283,10 +283,10 @@ void * FIRFilter::operator new(size_t)
 
 FIRFilter * FIRFilter::newInstance()
 {
-    __attribute__((unused))
     uint uExtensions;
 
     uExtensions = detectCPUextensions();
+    (void)uExtensions;
 
     // Check if MMX/SSE instruction set extensions supported by CPU
 
diff --git a/source/SoundTouch/TDStretch.cpp b/source/SoundTouch/TDStretch.cpp
index 231f72c..f04dde0 100644
--- a/source/SoundTouch/TDStretch.cpp
+++ b/source/SoundTouch/TDStretch.cpp
@@ -750,10 +750,10 @@ void * TDStretch::operator new(size_t)
 
 TDStretch * TDStretch::newInstance()
 {
-    __attribute__((unused))
     uint uExtensions;
 
     uExtensions = detectCPUextensions();
+    (void)uExtensions;
 
     // Check if MMX/SSE instruction set extensions supported by CPU