diff --git a/leopard/leopard.nim b/leopard/leopard.nim
index dd749b9..615f7ad 100644
--- a/leopard/leopard.nim
+++ b/leopard/leopard.nim
@@ -77,7 +77,7 @@ func encode*(
       self.buffers.cuint,
       self.parity.cuint,
       self.workBufferCount.cuint,
-      cast[ptr pointer](addr self.dataBufferPtr[0]),
+      cast[LeoDataPtr](addr self.dataBufferPtr[0]),
       cast[ptr pointer](addr self.workBufferPtr[0]))
 
   if ord(res) != ord(LeopardSuccess):
@@ -148,8 +148,8 @@ func decode*(
       self.buffers.cuint,
       self.parity.cuint,
       self.decodeBufferCount.cuint,
-      cast[ptr pointer](addr dataPtr[0]),
-      cast[ptr pointer](addr parityPtr[0]),
+      cast[LeoDataPtr](addr dataPtr[0]),
+      cast[LeoDataPtr](addr parityPtr[0]),
       cast[ptr pointer](addr self.decodeBufferPtr[0]))
 
   if ord(res) != ord(LeopardSuccess):
diff --git a/leopard/wrapper.nim b/leopard/wrapper.nim
index 5efbf1b..90d8b5a 100644
--- a/leopard/wrapper.nim
+++ b/leopard/wrapper.nim
@@ -68,7 +68,7 @@ import std/os
 import std/strutils
 
 type
-  LeoDataPtr* {.importc: "const void* const * const", bycopy.} = pointer
+  LeoDataPtr* {.importc: "const void* const*", bycopy.} = pointer
 
 const
   LeopardCmakeFlags {.strdefine.} =