diff --git a/Eigen/src/Core/CacheFriendlyProduct.h b/Eigen/src/Core/CacheFriendlyProduct.h
index e2a501736..f86f00dd2 100644
--- a/Eigen/src/Core/CacheFriendlyProduct.h
+++ b/Eigen/src/Core/CacheFriendlyProduct.h
@@ -442,11 +442,11 @@ static EIGEN_DONT_INLINE void ei_cache_friendly_product_colmajor_times_vector(
         {
           case AllAligned:
             for (int j = alignedStart; j<alignedSize; j+=PacketSize)
-              _EIGEN_ACCUMULATE_PACKETS(,,,);
+              _EIGEN_ACCUMULATE_PACKETS(EIGEN_EMPTY,EIGEN_EMPTY,EIGEN_EMPTY,EIGEN_EMPTY);
             break;
           case EvenAligned:
             for (int j = alignedStart; j<alignedSize; j+=PacketSize)
-              _EIGEN_ACCUMULATE_PACKETS(,u,,);
+              _EIGEN_ACCUMULATE_PACKETS(EIGEN_EMPTY,u,EIGEN_EMPTY,EIGEN_EMPTY);
             break;
           case FirstAligned:
             if(peels>1)
@@ -482,11 +482,11 @@ static EIGEN_DONT_INLINE void ei_cache_friendly_product_colmajor_times_vector(
               }
             }
             for (int j = peeledSize; j<alignedSize; j+=PacketSize)
-              _EIGEN_ACCUMULATE_PACKETS(,u,u,);
+              _EIGEN_ACCUMULATE_PACKETS(EIGEN_EMPTY,u,u,EIGEN_EMPTY);
             break;
           default:
             for (int j = alignedStart; j<alignedSize; j+=PacketSize)
-              _EIGEN_ACCUMULATE_PACKETS(u,u,u,);
+              _EIGEN_ACCUMULATE_PACKETS(u,u,u,EIGEN_EMPTY);
             break;
         }
       }
@@ -636,11 +636,11 @@ static EIGEN_DONT_INLINE void ei_cache_friendly_product_rowmajor_times_vector(
         {
           case AllAligned:
             for (int j = alignedStart; j<alignedSize; j+=PacketSize)
-              _EIGEN_ACCUMULATE_PACKETS(,,,);
+              _EIGEN_ACCUMULATE_PACKETS(EIGEN_EMPTY,EIGEN_EMPTY,EIGEN_EMPTY,EIGEN_EMPTY);
             break;
           case EvenAligned:
             for (int j = alignedStart; j<alignedSize; j+=PacketSize)
-              _EIGEN_ACCUMULATE_PACKETS(,u,,);
+              _EIGEN_ACCUMULATE_PACKETS(EIGEN_EMPTY,u,EIGEN_EMPTY,EIGEN_EMPTY);
             break;
           case FirstAligned:
             if (peels>1)
@@ -679,11 +679,11 @@ static EIGEN_DONT_INLINE void ei_cache_friendly_product_rowmajor_times_vector(
               }
             }
             for (int j = peeledSize; j<alignedSize; j+=PacketSize)
-              _EIGEN_ACCUMULATE_PACKETS(,u,u,);
+              _EIGEN_ACCUMULATE_PACKETS(EIGEN_EMPTY,u,u,EIGEN_EMPTY);
             break;
           default:
             for (int j = alignedStart; j<alignedSize; j+=PacketSize)
-              _EIGEN_ACCUMULATE_PACKETS(u,u,u,);
+              _EIGEN_ACCUMULATE_PACKETS(u,u,u,EIGEN_EMPTY);
             break;
         }
         tmp0 += ei_predux(ptmp0);
diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index d3698e819..a7137cc03 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -165,6 +165,9 @@ using Eigen::ei_cos;
 #define EIGEN_DEFAULT_IO_FORMAT Eigen::IOFormat()
 #endif
 
+// just an empty macro !
+#define EIGEN_EMPTY
+
 // format used in Eigen's documentation
 // needed to define it here as escaping characters in CMake add_definition's argument seems very problematic.
 #define EIGEN_DOCS_IO_FORMAT IOFormat(3, AlignCols, " ", "\n", "", "")