diff --git a/src/kernel/qpixmap_x11.cpp b/src/kernel/qpixmap_x11.cpp
index 897dd4cf..0eb1cf04 100644
--- a/src/kernel/qpixmap_x11.cpp
+++ b/src/kernel/qpixmap_x11.cpp
@@ -1243,8 +1243,8 @@ bool TQPixmap::convertFromImage( const TQImage &img, int conversion_flags )
     bool    trucol = (visual->c_class == TrueColor || visual->c_class == DirectColor);
     int	    nbytes = image.numBytes();
     uchar  *newbits= 0;
-    int newbits_size = 0;
 #ifdef QT_MITSHM_CONVERSIONS
+    int newbits_size = 0;
     bool mitshm_ximage = false;
     XShmSegmentInfo shminfo;
 #endif
@@ -1615,7 +1615,9 @@ bool TQPixmap::convertFromImage( const TQImage &img, int conversion_flags )
 	}
 
 	newbits = (uchar *)malloc( nbytes );	// copy image into newbits
+#ifdef QT_MITSHM_CONVERSIONS
         newbits_size = nbytes;
+#endif
 	TQ_CHECK_PTR( newbits );
 	if ( !newbits )				// no memory
 	    return FALSE;
@@ -1744,7 +1746,9 @@ bool TQPixmap::convertFromImage( const TQImage &img, int conversion_flags )
 	    ushort *p2;
 	    int	    p2inc = xi->bytes_per_line/sizeof(ushort);
 	    ushort *newerbits = (ushort *)malloc( xi->bytes_per_line * h );
+#ifdef QT_MITSHM_CONVERSIONS
             newbits_size = xi->bytes_per_line * h;
+#endif
 	    TQ_CHECK_PTR( newerbits );
 	    if ( !newerbits )				// no memory
 		return FALSE;