diff --git a/Makefile b/Makefile
index d89e0de..232b9f9 100644
--- a/Makefile
+++ b/Makefile
@@ -55,7 +55,7 @@ INST_HEADERS:=kernel.h user.h fasthdlc.h wctdm_user.h dahdi_config.h
 
 DAHDI_BUILD_ALL:=m
 
-KMAKE=$(MAKE) -C $(KSRC) SUBDIRS=$(PWD)/drivers/dahdi DAHDI_INCLUDE=$(PWD)/include DAHDI_MODULES_EXTRA="$(DAHDI_MODULES_EXTRA)" HOTPLUG_FIRMWARE=$(HOTPLUG_FIRMWARE)
+KMAKE=+$(MAKE) -C $(KSRC) SUBDIRS=$(PWD)/drivers/dahdi DAHDI_INCLUDE=$(PWD)/include DAHDI_MODULES_EXTRA="$(DAHDI_MODULES_EXTRA)" HOTPLUG_FIRMWARE=$(HOTPLUG_FIRMWARE)
 
 ROOT_PREFIX:=