diff --git a/src/string/memcpy.cpp b/src/string/memcpy.cpp
index a805671..00d66ea 100644
--- a/src/string/memcpy.cpp
+++ b/src/string/memcpy.cpp
@@ -44,12 +44,8 @@
     return CopyBlock<4>(dst, src);
   if (count < 8)
     return CopyBlockOverlap<4>(dst, src, count);
-  if (count == 8)
-    return CopyBlock<8>(dst, src);
   if (count < 16)
     return CopyBlockOverlap<8>(dst, src, count);
-  if (count == 16)
-    return CopyBlock<16>(dst, src);
   if (count < 32)
     return CopyBlockOverlap<16>(dst, src, count);
   if (count < 64)
diff --git a/src/string/x86/memcpy.cpp b/src/string/x86/memcpy.cpp
index 811ce51..2e2148e 100644
--- a/src/string/x86/memcpy.cpp
+++ b/src/string/x86/memcpy.cpp
@@ -59,12 +59,8 @@
     return CopyBlock<4>(dst, src);
   if (count < 8)
     return CopyBlockOverlap<4>(dst, src, count);
-  if (count == 8)
-    return CopyBlock<8>(dst, src);
   if (count < 16)
     return CopyBlockOverlap<8>(dst, src, count);
-  if (count == 16)
-    return CopyBlock<16>(dst, src);
   if (count < 32)
     return CopyBlockOverlap<16>(dst, src, count);
   if (count < 64)