diff --git a/src/linux/X11FrameProcessor.cpp b/src/linux/X11FrameProcessor.cpp
index e30540f4..b687bd95 100644
--- a/src/linux/X11FrameProcessor.cpp
+++ b/src/linux/X11FrameProcessor.cpp
@@ -89,7 +89,7 @@ namespace Screen_Capture
 
         if(Data->CaptureEntireMonitor && !Data->CaptureDifMonitor) {
 
-            auto wholeimg = Create(ret, PixelStride, 0, Image->data);
+            auto wholeimg = Create(ret, PixelStride, 0, reinterpret_cast<unsigned char*>(Image->data));
             Data->CaptureEntireMonitor(wholeimg, SelectedMonitor);
         } else {
             memcpy(NewImageBuffer.get(), Image->data, PixelStride * ret.right * ret.bottom);
diff --git a/src/linux/X11MouseProcessor.cpp b/src/linux/X11MouseProcessor.cpp
index 4fd971c3..cd101b0c 100644
--- a/src/linux/X11MouseProcessor.cpp
+++ b/src/linux/X11MouseProcessor.cpp
@@ -52,8 +52,8 @@ namespace SL {
             imgrect.bottom = img->height;
             auto newsize = PixelStride*imgrect.right*imgrect.bottom;
             if(newsize>ImageBufferSize){
-                NewImageBuffer = std::make_unique<char[]>(PixelStride*imgrect.right*imgrect.bottom);
-                OldImageBuffer=std::make_unique<char[]>(PixelStride*imgrect.right*imgrect.bottom);
+                NewImageBuffer = std::make_unique<unsigned char[]>(PixelStride*imgrect.right*imgrect.bottom);
+                OldImageBuffer=std::make_unique<unsigned char[]>(PixelStride*imgrect.right*imgrect.bottom);
             }
             
             memcpy(NewImageBuffer.get(), img->pixels, newsize);