diff --git a/configs/sama5d3x-ek/src/sam_wm8904.c b/configs/sama5d3x-ek/src/sam_wm8904.c
index 1274443aa04..f1f955afbf1 100644
--- a/configs/sama5d3x-ek/src/sam_wm8904.c
+++ b/configs/sama5d3x-ek/src/sam_wm8904.c
@@ -120,6 +120,7 @@ static struct sama5d3ek_mwinfo_s g_mxtinfo =
   {
     .address   = WM8904_I2C_ADDRESS,
     .frequency = CONFIG_SAMA5D3xEK_WM8904_I2CFREQUENCY,
+    .mclk      = BOARD_SLOWCLK_FREQUENCY,
 
     .attach    = wm8904_attach,
     .enable    = wm8904_enable,
diff --git a/configs/sama5d4-ek/src/sam_wm8904.c b/configs/sama5d4-ek/src/sam_wm8904.c
index a963692c001..7207c6ecd1f 100644
--- a/configs/sama5d4-ek/src/sam_wm8904.c
+++ b/configs/sama5d4-ek/src/sam_wm8904.c
@@ -120,6 +120,7 @@ static struct sama5d4ek_mwinfo_s g_mxtinfo =
   {
     .address   = WM8904_I2C_ADDRESS,
     .frequency = CONFIG_SAMA5D4EK_WM8904_I2CFREQUENCY,
+    .mclk      = BOARD_SLOWCLK_FREQUENCY,
 
     .attach    = wm8904_attach,
     .enable    = wm8904_enable,