diff --git a/drivers/dpll/zl3073x/ref.h b/drivers/dpll/zl3073x/ref.h
index efc7f59cd9f9..0d8618f5ce8d 100644
--- a/drivers/dpll/zl3073x/ref.h
+++ b/drivers/dpll/zl3073x/ref.h
@@ -91,6 +91,8 @@ zl3073x_ref_freq_set(struct zl3073x_ref *ref, u32 freq)
 
 	ref->freq_base = base;
 	ref->freq_mult = mult;
+	ref->freq_ratio_m = 1;
+	ref->freq_ratio_n = 1;
 
 	return 0;
 }