diff --git a/common/fft.h b/common/fft.h
index bc58f1dded7..ef5f6e95ad3 100644
--- a/common/fft.h
+++ b/common/fft.h
@@ -67,7 +67,6 @@ private:
 	Complex *_tmpBuf;
 
 	int _splitRadix;
-	int _permutation;
 
 	static int splitRadixPermutation(int i, int n, int inverse);