diff --git a/sys/dev/pci/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c b/sys/dev/pci/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
index 17de08e351e..04f705033e2 100644
--- a/sys/dev/pci/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
+++ b/sys/dev/pci/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
@@ -1494,7 +1494,7 @@ static int smu_v13_0_6_print_clk_levels(struct smu_context *smu,
 
 	case SMU_OD_MCLK:
 		if (!smu_v13_0_6_cap_supported(smu, SMU_CAP(SET_UCLK_MAX)))
-			return 0;
+			return -EOPNOTSUPP;
 
 		size += sysfs_emit_at(buf, size, "%s:\n", "OD_MCLK");
 		size += sysfs_emit_at(buf, size, "0: %uMhz\n1: %uMhz\n",