--- a/sys/dev/drm/radeon/btc_dpm.c
+++ b/sys/dev/drm/radeon/btc_dpm.c
@@ -2601,7 +2601,7 @@
 
 	ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
 					     0, false, &dividers);
-	if (ret)
+	if (!ret)
 		pi->ref_div = dividers.ref_div + 1;
 	else
 		pi->ref_div = R600_REFERENCEDIVIDER_DFLT;