diff --git a/inc/efilib.h b/inc/efilib.h
index 91b5118..af47019 100644
--- a/inc/efilib.h
+++ b/inc/efilib.h
@@ -272,17 +272,17 @@ ZeroMem (
     IN UINTN     Size
     );
 
-VOID
+VOID EFIAPI
 SetMem (
     IN VOID     *Buffer,
     IN UINTN    Size,
     IN UINT8    Value
     );
 
-VOID
+VOID EFIAPI
 CopyMem (
     IN VOID     *Dest,
-    IN CONST VOID     *Src,
+    IN VOID     *Src,
     IN UINTN    len
     );
 
diff --git a/lib/misc.c b/lib/misc.c
index 47331d0..c9a4b0b 100644
--- a/lib/misc.c
+++ b/lib/misc.c
@@ -98,7 +98,7 @@ ZeroMem (
     RtZeroMem (Buffer, Size);
 }
 
-VOID
+VOID EFIAPI
 SetMem (
     IN VOID     *Buffer,
     IN UINTN    Size,
@@ -108,10 +108,10 @@ SetMem (
     RtSetMem (Buffer, Size, Value);
 }
 
-VOID
+VOID EFIAPI
 CopyMem (
     IN VOID     *Dest,
-    IN CONST VOID     *Src,
+    IN VOID     *Src,
     IN UINTN    len
     )
 {
diff --git a/lib/str.c b/lib/str.c
index cf5c724..b78bf86 100644
--- a/lib/str.c
+++ b/lib/str.c
@@ -211,7 +211,7 @@ StrDuplicate (
     Size = StrSize(Src);
     Dest = AllocatePool (Size);
     if (Dest) {
-        CopyMem (Dest, Src, Size);
+        CopyMem (Dest, (void *)Src, Size);
     }
     return Dest;
 }