diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 0.22.1
++ Use correct signatures for 'memset' and 'memcpy'
+The WASM linker is more strict about function signatures matching, see https://releases.llvm.org/11.1.0/tools/lld/docs/WebAssembly.html#function-signatures
+
+thanks @clinton-grc
+
 ## 0.22.0
 + Added `slice :: ByteArray bs => bs -> Int -> Int -> Maybe bs`
   and `unsafeSlice :: ByteArray bs => bs -> Int -> Int -> bs`
diff --git a/Data/Memory/PtrMethods.hs b/Data/Memory/PtrMethods.hs
--- a/Data/Memory/PtrMethods.hs
+++ b/Data/Memory/PtrMethods.hs
@@ -63,7 +63,7 @@
 
 -- | Copy a set number of bytes from @src to @dst
 memCopy :: Ptr Word8 -> Ptr Word8 -> Int -> IO ()
-memCopy dst src n = c_memcpy dst src (fromIntegral n)
+memCopy dst src n = c_memcpy dst src (fromIntegral n) >>= \_ -> return ()
 {-# INLINE memCopy #-}
 
 -- | Set @n number of bytes to the same value @v
@@ -114,7 +114,7 @@
             loop (i+1) (acc .|. e)
 
 foreign import ccall unsafe "memset"
-    c_memset :: Ptr Word8 -> Word8 -> CSize -> IO ()
+    c_memset :: Ptr Word8 -> Word8 -> CSize -> IO (Ptr Word8)
 
 foreign import ccall unsafe "memcpy"
-    c_memcpy :: Ptr Word8 -> Ptr Word8 -> CSize -> IO ()
+    c_memcpy :: Ptr Word8 -> Ptr Word8 -> CSize -> IO (Ptr Word8)
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-memory
+ram
 ======
 
 [![BSD](http://b.repl.ca/v1/license-BSD-blue.png)](http://en.wikipedia.org/wiki/BSD_licenses)
diff --git a/ram.cabal b/ram.cabal
--- a/ram.cabal
+++ b/ram.cabal
@@ -1,6 +1,6 @@
 cabal-version:   3.0
 name:            ram
-version:         0.22.0
+version:         0.22.1
 synopsis:        memory and related abstraction stuff
 description:
   This is a fork of memory. It's open to accept changes from anyone,