diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
index 94163e598d..d8fb37a897 100644
--- a/hw/cirrus_vga.c
+++ b/hw/cirrus_vga.c
@@ -1000,12 +1000,12 @@ static void cirrus_write_bitblt(CirrusVGAState * s, unsigned reg_value)
  ***************************************/
 
 static void cirrus_get_offsets(VGAState *s1, 
-                                   uint32_t *pline_offset,
-                                   uint32_t *pstart_addr)
+                               uint32_t *pline_offset,
+                               uint32_t *pstart_addr,
+                               uint32_t *pline_compare)
 {
     CirrusVGAState * s = (CirrusVGAState *)s1;
-    uint32_t start_addr;
-    uint32_t line_offset;
+    uint32_t start_addr, line_offset, line_compare;
 
     line_offset = s->cr[0x13]
 	| ((s->cr[0x1b] & 0x10) << 4);
@@ -1018,6 +1018,11 @@ static void cirrus_get_offsets(VGAState *s1,
 	| ((s->cr[0x1b] & 0x0c) << 15)
 	| ((s->cr[0x1d] & 0x80) << 12);
     *pstart_addr = start_addr;
+
+    line_compare = s->cr[0x18] | 
+        ((s->cr[0x07] & 0x10) << 4) |
+        ((s->cr[0x09] & 0x40) << 3);
+    *pline_compare = line_compare;
 }
 
 static uint32_t cirrus_get_bpp16_depth(CirrusVGAState * s)
diff --git a/hw/vga.c b/hw/vga.c
index c77b9f9ff1..4ecb7a95cf 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -935,13 +935,15 @@ static int update_palette256(VGAState *s)
 
 static void vga_get_offsets(VGAState *s, 
                             uint32_t *pline_offset, 
-                            uint32_t *pstart_addr)
+                            uint32_t *pstart_addr,
+                            uint32_t *pline_compare)
 {
-    uint32_t start_addr, line_offset;
+    uint32_t start_addr, line_offset, line_compare;
 #ifdef CONFIG_BOCHS_VBE
     if (s->vbe_regs[VBE_DISPI_INDEX_ENABLE] & VBE_DISPI_ENABLED) {
         line_offset = s->vbe_line_offset;
         start_addr = s->vbe_start_addr;
+        line_compare = 65535;
     } else
 #endif
     {  
@@ -951,9 +953,15 @@ static void vga_get_offsets(VGAState *s,
 
         /* starting address */
         start_addr = s->cr[0x0d] | (s->cr[0x0c] << 8);
+
+        /* line compare */
+        line_compare = s->cr[0x18] | 
+            ((s->cr[0x07] & 0x10) << 4) |
+            ((s->cr[0x09] & 0x40) << 3);
     }
     *pline_offset = line_offset;
     *pstart_addr = start_addr;
+    *pline_compare = line_compare;
 }
 
 /* update start_addr and line_offset. Return TRUE if modified */
@@ -964,11 +972,7 @@ static int update_basic_params(VGAState *s)
     
     full_update = 0;
 
-    s->get_offsets(s, &line_offset, &start_addr);
-    /* line compare */
-    line_compare = s->cr[0x18] | 
-        ((s->cr[0x07] & 0x10) << 4) |
-        ((s->cr[0x09] & 0x40) << 3);
+    s->get_offsets(s, &line_offset, &start_addr, &line_compare);
 
     if (line_offset != s->line_offset ||
         start_addr != s->start_addr ||
diff --git a/hw/vga_int.h b/hw/vga_int.h
index e4a4a46cd4..70127768a4 100644
--- a/hw/vga_int.h
+++ b/hw/vga_int.h
@@ -108,7 +108,8 @@
     int (*get_bpp)(struct VGAState *s);                                 \
     void (*get_offsets)(struct VGAState *s,                             \
                         uint32_t *pline_offset,                         \
-                        uint32_t *pstart_addr);                         \
+                        uint32_t *pstart_addr,                          \
+                        uint32_t *pline_compare);                       \
     void (*get_resolution)(struct VGAState *s,                          \
                         int *pwidth,                                    \
                         int *pheight);                                  \