diff --git a/source/BecassoMain.cpp b/source/BecassoMain.cpp
index 6e0b98b..bc78e24 100644
--- a/source/BecassoMain.cpp
+++ b/source/BecassoMain.cpp
@@ -162,7 +162,7 @@ void generate_alphabuffer (char *alpha)
 	gAlphaBuffer[253] = schar[1];
 	gAlphaBuffer[254] = schar[2];
 	gAlphaBuffer[255] = schar[3];
-	char xAlphaMask[256] = { KEYFILE_MASK };
+	uchar xAlphaMask[256] = { KEYFILE_MASK };
 	char wbuffer[256];
 	for (i = 0; i < 255; i++)
 		wbuffer[i] = gAlphaBuffer[i] ^ xAlphaMask[i];
diff --git a/source/CanvasView.cpp b/source/CanvasView.cpp
index e6b4576..24d13bc 100644
--- a/source/CanvasView.cpp
+++ b/source/CanvasView.cpp
@@ -4292,7 +4292,7 @@ void CanvasView::CopyTarget (BMessage *message)
 		message->PrintToStream();
 	}
 
-	extern bool gGlobalAlpha;
+	extern int gGlobalAlpha;
 	if (!gGlobalAlpha)
 	{
 #if SAVE_DISABLED