diff --git a/src/atombios_crtc.c b/src/atombios_crtc.c
index 62402a7..f58599f 100644
--- a/src/atombios_crtc.c
+++ b/src/atombios_crtc.c
@@ -332,6 +332,15 @@ atombios_crtc_set_pll(xf86CrtcPtr crtc, DisplayModePtr mode)
 	    temp = INREG(AVIVO_P2PLL_INT_SS_CNTL);
 	    OUTREG(AVIVO_P2PLL_INT_SS_CNTL, temp & ~1);
 	}
+	for (i = 0; i < xf86_config->num_output; i++) {
+	    xf86OutputPtr output = xf86_config->output[i];
+	    if (output->crtc == crtc) {
+		radeon_encoder = radeon_get_encoder(output);
+		/* DVO seems to want 2x pixel clock */
+		if (radeon_encoder && (radeon_encoder->encoder_id == ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1))
+		    sclock *= 2;
+	    }
+	}
     } else {
 	pll_flags |= RADEON_PLL_LEGACY;