diff --git a/src/i830_display.c b/src/i830_display.c
index 92e52ed..4132da2 100644
--- a/src/i830_display.c
+++ b/src/i830_display.c
@@ -519,6 +519,23 @@ i830_display_tiled(xf86CrtcPtr crtc)
 }
 
 static Bool
+i830_display_cloned(xf86CrtcPtr crtc)
+{
+    ScrnInfoPtr pScrn = crtc->scrn;
+    xf86CrtcConfigPtr xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
+    I830Ptr pI830 = I830PTR(pScrn);
+    int i, crtc_count = 0;
+
+    for (i = 0; i < xf86_config->num_output; i++) {
+	xf86OutputPtr output = xf86_config->output[i];
+	if (output->crtc == crtc)
+	    crtc_count++;
+    }
+
+    return crtc_count > 1 ? TRUE : FALSE;
+}
+
+static Bool
 i830_use_fb_compression(xf86CrtcPtr crtc)
 {
     ScrnInfoPtr pScrn = crtc->scrn;
@@ -532,6 +549,9 @@ i830_use_fb_compression(xf86CrtcPtr crtc)
     if (!i830_display_tiled(crtc))
 	return FALSE;
 
+    if (i830_display_cloned(crtc))
+	return FALSE;
+
     /* Pre-965 only supports plane A */
     if (!IS_I965GM(pI830) && plane != FBC_CTL_PLANEA)
 	return FALSE;