diff --git a/kiss_fft.h b/kiss_fft.h
index 1ca0b45..a6afde7 100644
--- a/kiss_fft.h
+++ b/kiss_fft.h
@@ -34,12 +34,12 @@ extern "C" {
 #ifdef USE_SIMD
 # include <xmmintrin.h>
 # define kiss_fft_scalar __m128
-#define KISS_FFT_MALLOC(nbytes) _mm_malloc(nbytes,16)
-#define KISS_FFT_FREE _mm_free
-#else	
-#define KISS_FFT_MALLOC malloc
-#define KISS_FFT_FREE free
-#endif	
+# define KISS_FFT_MALLOC(nbytes) _mm_malloc(nbytes,16)
+# define KISS_FFT_FREE _mm_free
+#else
+# define KISS_FFT_MALLOC malloc
+# define KISS_FFT_FREE free
+#endif
 
 
 #ifdef FIXED_POINT