diff --git a/Source/TransformFunctions/arm_cfft_radix4_q15.c b/Source/TransformFunctions/arm_cfft_radix4_q15.c
index f0f257c6..592549a1 100644
--- a/Source/TransformFunctions/arm_cfft_radix4_q15.c
+++ b/Source/TransformFunctions/arm_cfft_radix4_q15.c
@@ -46,7 +46,7 @@ void arm_bitreversal_q15(
   q15_t * pSrc,
   uint32_t fftLen,
   uint16_t bitRevFactor,
-  const int16_t * pBitRevTab);
+  const uint16_t * pBitRevTab);
 
 /**
  * @ingroup groupTransforms