diff --git a/src/inflate.c b/src/inflate.c
index 8f6d059..8f7f1fd 100644
--- a/src/inflate.c
+++ b/src/inflate.c
@@ -22,8 +22,8 @@ static const uint8_t* comprBufferNext;
 static uint8_t* uncomprBufferNext;
 //Buffer lengths
 static unsigned long uncomprBufferSize;
-static size_t remainingInput;
-static size_t spaceInOutput;
+static unsigned long remainingInput;
+static unsigned long spaceInOutput;
 //Internal variables used by miniz
 static tinfl_decompressor decompressor;
 static tinfl_status status;