diff --git a/webrtc/common_audio/signal_processing/include/signal_processing_library.h b/webrtc/common_audio/signal_processing/include/signal_processing_library.h
index e3a29ae5f2..d13973cadc 100644
--- a/webrtc/common_audio/signal_processing/include/signal_processing_library.h
+++ b/webrtc/common_audio/signal_processing/include/signal_processing_library.h
@@ -40,8 +40,6 @@
     ((int32_t) ((int32_t)(a) * (int32_t)(b)))
 #define WEBRTC_SPL_UMUL(a, b) \
     ((uint32_t) ((uint32_t)(a) * (uint32_t)(b)))
-#define WEBRTC_SPL_UMUL_16_16(a, b) \
-    ((uint32_t) (uint16_t)(a) * (uint16_t)(b))
 #define WEBRTC_SPL_UMUL_32_16(a, b) \
     ((uint32_t) ((uint32_t)(a) * (uint16_t)(b)))
 #define WEBRTC_SPL_MUL_16_U16(a, b) \
diff --git a/webrtc/common_audio/signal_processing/signal_processing_unittest.cc b/webrtc/common_audio/signal_processing/signal_processing_unittest.cc
index 3d9f6054a1..aa1f178710 100644
--- a/webrtc/common_audio/signal_processing/signal_processing_unittest.cc
+++ b/webrtc/common_audio/signal_processing/signal_processing_unittest.cc
@@ -41,7 +41,6 @@ TEST_F(SplTest, MacroTest) {
     EXPECT_EQ(-2147483645, WEBRTC_SPL_MUL(a, b));
     EXPECT_EQ(2147483651u, WEBRTC_SPL_UMUL(a, b));
     b = WEBRTC_SPL_WORD16_MAX >> 1;
-    EXPECT_EQ(1073627139u, WEBRTC_SPL_UMUL_16_16(a, b));
     EXPECT_EQ(4294918147u, WEBRTC_SPL_UMUL_32_16(a, b));
     EXPECT_EQ(-49149, WEBRTC_SPL_MUL_16_U16(a, b));
 
diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/source/arith_routines_logist.c b/webrtc/modules/audio_coding/codecs/isac/fix/source/arith_routines_logist.c
index 27f582a2fc..5c4ffc872c 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/source/arith_routines_logist.c
+++ b/webrtc/modules/audio_coding/codecs/isac/fix/source/arith_routines_logist.c
@@ -300,7 +300,7 @@ int16_t WebRtcIsacfix_DecLogisticMulti2(int16_t *dataQ7,
       candQ7 = - *dataQ7 + 64;
       cdfTmp = WebRtcIsacfix_Piecewise(WEBRTC_SPL_MUL_16_U16(candQ7, tmpARSpecQ8));
 
-      W_tmp = WEBRTC_SPL_UMUL_16_16(cdfTmp, W_upper_MSB);
+      W_tmp = (uint32_t)cdfTmp * W_upper_MSB;
       W_tmp += ((uint32_t)cdfTmp * (uint32_t)W_upper_LSB) >> 16;
 
       if (streamVal > W_tmp)
@@ -309,7 +309,7 @@ int16_t WebRtcIsacfix_DecLogisticMulti2(int16_t *dataQ7,
         candQ7 += 128;
         cdfTmp = WebRtcIsacfix_Piecewise(WEBRTC_SPL_MUL_16_U16(candQ7, tmpARSpecQ8));
 
-        W_tmp = WEBRTC_SPL_UMUL_16_16(cdfTmp, W_upper_MSB);
+        W_tmp = (uint32_t)cdfTmp * W_upper_MSB;
         W_tmp += ((uint32_t)cdfTmp * (uint32_t)W_upper_LSB) >> 16;
 
         while (streamVal > W_tmp)
@@ -319,7 +319,7 @@ int16_t WebRtcIsacfix_DecLogisticMulti2(int16_t *dataQ7,
           cdfTmp = WebRtcIsacfix_Piecewise(
               WEBRTC_SPL_MUL_16_U16(candQ7, tmpARSpecQ8));
 
-          W_tmp = WEBRTC_SPL_UMUL_16_16(cdfTmp, W_upper_MSB);
+          W_tmp = (uint32_t)cdfTmp * W_upper_MSB;
           W_tmp += ((uint32_t)cdfTmp * (uint32_t)W_upper_LSB) >> 16;
 
           /* error check */
@@ -338,7 +338,7 @@ int16_t WebRtcIsacfix_DecLogisticMulti2(int16_t *dataQ7,
         candQ7 -= 128;
         cdfTmp = WebRtcIsacfix_Piecewise(WEBRTC_SPL_MUL_16_U16(candQ7, tmpARSpecQ8));
 
-        W_tmp = WEBRTC_SPL_UMUL_16_16(cdfTmp, W_upper_MSB);
+        W_tmp = (uint32_t)cdfTmp * W_upper_MSB;
         W_tmp += ((uint32_t)cdfTmp * (uint32_t)W_upper_LSB) >> 16;
 
         while ( !(streamVal > W_tmp) )
@@ -348,7 +348,7 @@ int16_t WebRtcIsacfix_DecLogisticMulti2(int16_t *dataQ7,
           cdfTmp = WebRtcIsacfix_Piecewise(
               WEBRTC_SPL_MUL_16_U16(candQ7, tmpARSpecQ8));
 
-          W_tmp = WEBRTC_SPL_UMUL_16_16(cdfTmp, W_upper_MSB);
+          W_tmp = (uint32_t)cdfTmp * W_upper_MSB;
           W_tmp += ((uint32_t)cdfTmp * (uint32_t)W_upper_LSB) >> 16;
 
           /* error check */