diff --git a/dlls/winex11.drv/dib.c b/dlls/winex11.drv/dib.c
index 587c7c7b29b..bf1851959fc 100644
--- a/dlls/winex11.drv/dib.c
+++ b/dlls/winex11.drv/dib.c
@@ -371,7 +371,7 @@ static int *X11DRV_DIB_GenColorMap( X11DRV_PDEVICE *physDev, int *colorMapping,
             }
             else
                 for (i = start; i < end; i++, rgb++)
-                    colorMapping[i] = X11DRV_PALETTE_LookupPixel(RGB(rgb->rgbRed,
+                    colorMapping[i] = X11DRV_PALETTE_LookupPixel(physDev->color_shifts, RGB(rgb->rgbRed,
                                                                 rgb->rgbGreen,
                                                                 rgb->rgbBlue));
         }
@@ -395,7 +395,7 @@ static int *X11DRV_DIB_GenColorMap( X11DRV_PDEVICE *physDev, int *colorMapping,
             }
             else
                 for (i = start; i < end; i++, rgb++)
-                    colorMapping[i] = X11DRV_PALETTE_LookupPixel(RGB(rgb->rgbtRed,
+                    colorMapping[i] = X11DRV_PALETTE_LookupPixel(physDev->color_shifts, RGB(rgb->rgbtRed,
                                                                rgb->rgbtGreen,
                                                                rgb->rgbtBlue));
         }
diff --git a/dlls/winex11.drv/palette.c b/dlls/winex11.drv/palette.c
index cbdf2d152aa..adff6c1d4e3 100644
--- a/dlls/winex11.drv/palette.c
+++ b/dlls/winex11.drv/palette.c
@@ -1026,7 +1026,7 @@ int X11DRV_PALETTE_ToPhysical( X11DRV_PDEVICE *physDev, COLORREF color )
 /***********************************************************************
  *           X11DRV_PALETTE_LookupPixel
  */
-int X11DRV_PALETTE_LookupPixel(COLORREF color )
+int X11DRV_PALETTE_LookupPixel(ColorShifts *shifts, COLORREF color )
 {
     unsigned char spec_type = color >> 24;
 
@@ -1048,7 +1048,9 @@ int X11DRV_PALETTE_LookupPixel(COLORREF color )
         }
         else
         {
-            ColorShifts *shifts = &X11DRV_PALETTE_default_shifts;
+            /* No shifts are set in case of 1-bit */
+            if(!shifts) shifts = &X11DRV_PALETTE_default_shifts;
+
             /* scale each individually and construct the TrueColor pixel value */
             if (shifts->physicalRed.scale < 8)
                 red = red >> (8-shifts->physicalRed.scale);
@@ -1265,7 +1267,7 @@ UINT X11DRV_RealizePalette( X11DRV_PDEVICE *physDev, HPALETTE hpal, BOOL primary
                 }
                 else if ( X11DRV_PALETTE_PaletteFlags & X11DRV_PALETTE_VIRTUAL )
                 {
-                    index = X11DRV_PALETTE_LookupPixel( RGB( entries[i].peRed, entries[i].peGreen, entries[i].peBlue ));
+                    index = X11DRV_PALETTE_LookupPixel( physDev->color_shifts, RGB( entries[i].peRed, entries[i].peGreen, entries[i].peBlue ));
                 }
 
                 /* we have to map to existing entry in the system palette */
diff --git a/dlls/winex11.drv/x11drv.h b/dlls/winex11.drv/x11drv.h
index 9be93c611af..03b3750a4cc 100644
--- a/dlls/winex11.drv/x11drv.h
+++ b/dlls/winex11.drv/x11drv.h
@@ -491,7 +491,7 @@ extern BOOL X11DRV_IsSolidColor(COLORREF color);
 
 extern COLORREF X11DRV_PALETTE_ToLogical(X11DRV_PDEVICE *physDev, int pixel);
 extern int X11DRV_PALETTE_ToPhysical(X11DRV_PDEVICE *physDev, COLORREF color);
-extern int X11DRV_PALETTE_LookupPixel(COLORREF color);
+extern int X11DRV_PALETTE_LookupPixel(ColorShifts *shifts, COLORREF color);
 extern void X11DRV_PALETTE_ComputeColorShifts(ColorShifts *shifts, unsigned long redMask, unsigned long greenMask, unsigned long blueMask);
 
 extern unsigned int depth_to_bpp( unsigned int depth );