diff --git a/hwpack/am335x-bone-serial.conf b/hwpack/am335x-bone-serial.conf
index 02962c2..25f499d 100644
--- a/hwpack/am335x-bone-serial.conf
+++ b/hwpack/am335x-bone-serial.conf
@@ -19,6 +19,7 @@ boot_script="uEnv.txt"
 boot_fstype="fat"
 uboot_SCRIPT_ENTRY="uenvcmd"
 uboot_CMD_LOAD="load"
+uboot_USE_MMC_DEFINES=1
 uboot_fdt_auto_detection=1
 
 #Kernel:
diff --git a/hwpack/am335x-bone-video.conf b/hwpack/am335x-bone-video.conf
index 31686a5..83c6349 100644
--- a/hwpack/am335x-bone-video.conf
+++ b/hwpack/am335x-bone-video.conf
@@ -19,6 +19,7 @@ boot_script="uEnv.txt"
 boot_fstype="fat"
 uboot_SCRIPT_ENTRY="uenvcmd"
 uboot_CMD_LOAD="load"
+uboot_USE_MMC_DEFINES=1
 uboot_fdt_auto_detection=1
 
 #Kernel:
diff --git a/hwpack/am335x-boneblack.conf b/hwpack/am335x-boneblack.conf
index 604f9c5..b73b230 100644
--- a/hwpack/am335x-boneblack.conf
+++ b/hwpack/am335x-boneblack.conf
@@ -19,6 +19,7 @@ boot_script="uEnv.txt"
 boot_fstype="fat"
 uboot_SCRIPT_ENTRY="uenvcmd"
 uboot_CMD_LOAD="load"
+uboot_USE_MMC_DEFINES=1
 uboot_fdt_auto_detection=1
 
 #Kernel: