diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 9979f5e..12eef39 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -2,9 +2,7 @@
 # Makefile for the kernel mmc device drivers.
 #
 
-ifeq ($(CONFIG_MMC_DEBUG),y)
-	EXTRA_CFLAGS		+= -DDEBUG
-endif
+subdir-ccflags-$(CONFIG_MMC_DEBUG) := -DDEBUG
 
 obj-$(CONFIG_MMC)		+= core/
 obj-$(CONFIG_MMC)		+= card/
diff --git a/drivers/mmc/card/Makefile b/drivers/mmc/card/Makefile
index 0d40751..c73b406 100644
--- a/drivers/mmc/card/Makefile
+++ b/drivers/mmc/card/Makefile
@@ -2,10 +2,6 @@
 # Makefile for MMC/SD card drivers
 #
 
-ifeq ($(CONFIG_MMC_DEBUG),y)
-	EXTRA_CFLAGS		+= -DDEBUG
-endif
-
 obj-$(CONFIG_MMC_BLOCK)		+= mmc_block.o
 mmc_block-objs			:= block.o queue.o
 obj-$(CONFIG_MMC_TEST)		+= mmc_test.o
diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
index 889e5f8..86b4791 100644
--- a/drivers/mmc/core/Makefile
+++ b/drivers/mmc/core/Makefile
@@ -2,10 +2,6 @@
 # Makefile for the kernel mmc core.
 #
 
-ifeq ($(CONFIG_MMC_DEBUG),y)
-	EXTRA_CFLAGS		+= -DDEBUG
-endif
-
 obj-$(CONFIG_MMC)		+= mmc_core.o
 mmc_core-y			:= core.o bus.o host.o \
 				   mmc.o mmc_ops.o sd.o sd_ops.o \
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index f7fb7eb..eae5d62 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -2,10 +2,6 @@
 # Makefile for MMC/SD host controller drivers
 #
 
-ifeq ($(CONFIG_MMC_DEBUG),y)
-	EXTRA_CFLAGS		+= -DDEBUG
-endif
-
 obj-$(CONFIG_MMC_ARMMMCI)	+= mmci.o
 obj-$(CONFIG_MMC_PXA)		+= pxamci.o
 obj-$(CONFIG_MMC_IMX)		+= imxmmc.o