diff --git a/firmware/target/arm/imx233/sdmmc-imx233.c b/firmware/target/arm/imx233/sdmmc-imx233.c
index 65f253de1e..02f59a50f4 100644
--- a/firmware/target/arm/imx233/sdmmc-imx233.c
+++ b/firmware/target/arm/imx233/sdmmc-imx233.c
@@ -1000,6 +1000,10 @@ void mmc_enable(bool on)
     (void) on;
 }
 
+void mmc_sleepnow(void)
+{
+}
+
 bool mmc_disk_is_active(void)
 {
     return false;