diff --git a/Include/dsp/statistics_functions.h b/Include/dsp/statistics_functions.h
index 4d308b31..e1a2ee26 100755
--- a/Include/dsp/statistics_functions.h
+++ b/Include/dsp/statistics_functions.h
@@ -1005,7 +1005,7 @@ const float64_t * pSrc,
 void arm_accumulate_q7(
 const q7_t * pSrc,
       uint32_t blockSize,
-      q7_t * pResult);
+      q31_t * pResult);
 
 /**
  * @brief  Accumulation value of a Q15 vector.
@@ -1017,7 +1017,7 @@ const q7_t * pSrc,
 void arm_accumulate_q15(
 const q15_t * pSrc,
       uint32_t blockSize,
-      q15_t * pResult);
+      q63_t * pResult);
 
 /**
  * @brief  Accumulation value of a Q31 vector.
@@ -1029,7 +1029,7 @@ const q15_t * pSrc,
 void arm_accumulate_q31(
 const q31_t * pSrc,
       uint32_t blockSize,
-      q31_t * pResult);
+      q63_t * pResult);
 
 #ifdef   __cplusplus
 }
diff --git a/Source/StatisticsFunctions/arm_accumulate_q15.c b/Source/StatisticsFunctions/arm_accumulate_q15.c
index 7396c673..a5dfc9ca 100644
--- a/Source/StatisticsFunctions/arm_accumulate_q15.c
+++ b/Source/StatisticsFunctions/arm_accumulate_q15.c
@@ -57,11 +57,11 @@
 void arm_accumulate_q15(
                         const q15_t * pSrc,
                         uint32_t blockSize,
-                        q15_t * pResult)
+                        q63_t * pResult)
 {
   uint32_t  blkCnt;           /* loop counters */
   q15x8_t  vecSrc;
-  q31_t     sum = 0L;
+  q63_t     sum = 0L;
   
   /* Compute 8 outputs at a time */
   blkCnt = blockSize >> 3U;
@@ -97,10 +97,10 @@ void arm_accumulate_q15(
 void arm_accumulate_q15(
                         const q15_t * pSrc,
                         uint32_t blockSize,
-                        q15_t * pResult)
+                        q63_t * pResult)
 {
   uint32_t blkCnt;                               /* Loop counter */
-  q31_t sum = 0;                                 /* Temporary result storage */
+  q63_t sum = 0;                                 /* Temporary result storage */
   
 #if defined (ARM_MATH_LOOPUNROLL)
   q31_t in;
diff --git a/Source/StatisticsFunctions/arm_accumulate_q31.c b/Source/StatisticsFunctions/arm_accumulate_q31.c
index 40abe5e6..e790cf15 100644
--- a/Source/StatisticsFunctions/arm_accumulate_q31.c
+++ b/Source/StatisticsFunctions/arm_accumulate_q31.c
@@ -56,7 +56,7 @@
 void arm_accumulate_q31(
                         const q31_t * pSrc,
                         uint32_t blockSize,
-                        q31_t * pResult)
+                        q63_t * pResult)
 {
   uint32_t  blkCnt;           /* loop counters */
   q31x4_t vecSrc;
@@ -94,7 +94,7 @@ void arm_accumulate_q31(
 void arm_accumulate_q31(
                         const q31_t * pSrc,
                         uint32_t blockSize,
-                        q31_t * pResult)
+                        q63_t * pResult)
 {
   uint32_t blkCnt;                               /* Loop counter */
   q63_t sum = 0;                                 /* Temporary result storage */
diff --git a/Source/StatisticsFunctions/arm_accumulate_q7.c b/Source/StatisticsFunctions/arm_accumulate_q7.c
index 54e81d04..6aeed8de 100644
--- a/Source/StatisticsFunctions/arm_accumulate_q7.c
+++ b/Source/StatisticsFunctions/arm_accumulate_q7.c
@@ -58,7 +58,7 @@
 void arm_accumulate_q7(
                        const q7_t * pSrc,
                        uint32_t blockSize,
-                       q7_t * pResult)
+                       q31_t * pResult)
 {
   uint32_t  blkCnt;           /* loop counters */
   q7x16_t vecSrc;
@@ -96,7 +96,7 @@ void arm_accumulate_q7(
 void arm_accumulate_q7(
                        const q7_t * pSrc,
                        uint32_t blockSize,
-                       q7_t * pResult)
+                       q31_t * pResult)
 {
   uint32_t blkCnt;                               /* Loop counter */
   q31_t sum = 0;                                 /* Temporary result storage */