diff --git a/reactos/win32ss/gdi/eng/bitblt.c b/reactos/win32ss/gdi/eng/bitblt.c
index bd4a599599b..a1c002a567e 100644
--- a/reactos/win32ss/gdi/eng/bitblt.c
+++ b/reactos/win32ss/gdi/eng/bitblt.c
@@ -67,8 +67,6 @@ BltMask(SURFOBJ* psoDest,
     ASSERT(IS_VALID_ROP4(Rop4));
     ASSERT(psoMask->iBitmapFormat == BMF_1BPP);
 
-    if (!psoMask) return FALSE;
-
     fgndRop = ROP4_FGND(Rop4);
     bkgndRop = ROP4_BKGND(Rop4);
 
diff --git a/reactos/win32ss/gdi/eng/stretchblt.c b/reactos/win32ss/gdi/eng/stretchblt.c
index ab3feef645b..a244c784284 100644
--- a/reactos/win32ss/gdi/eng/stretchblt.c
+++ b/reactos/win32ss/gdi/eng/stretchblt.c
@@ -386,7 +386,7 @@ IntEngStretchBlt(SURFOBJ *psoDest,
     ASSERT(psoDest);
     //ASSERT(psoSource); // FIXME!
     ASSERT(DestRect);
-    //ASSERT(SourceRect); // FIXME!
+    ASSERT(SourceRect);
     //ASSERT(!RECTL_bIsEmptyRect(SourceRect)); // FIXME!
 
     /* If no clip object is given, use trivial one */
@@ -427,7 +427,7 @@ IntEngStretchBlt(SURFOBJ *psoDest,
         InputClippedRect.bottom = DestRect->top;
     }
 
-    if (NULL == SourceRect || NULL == psoSource)
+    if (NULL == psoSource)
     {
         return FALSE;
     }