diff --git a/Config.kmk b/Config.kmk
index 8a3a2a6..7a88a92 100644
--- a/Config.kmk
+++ b/Config.kmk
@@ -2856,7 +2856,7 @@ TEMPLATE_VBOXR0DRV_CFLAGS.x86          = -mpreferred-stack-boundary=2 -msoft-flo
 TEMPLATE_VBOXR0DRV_CFLAGS.amd64        = -m64 -mno-red-zone -mcmodel=kernel -mno-sse -mno-mmx -mno-sse2 -mno-3dnow \
 	-fno-reorder-blocks -ffreestanding -fno-asynchronous-unwind-tables -funit-at-a-time \
 	-Wno-sign-compare -Wdeclaration-after-statement
-TEMPLATE_VBOXR0DRV_CXXFLAGS            = $(filter-out -Wstrict-prototypes -Wno-pointer-sign -ffreestanding -Wdeclaration-after-statement -Werror-implicit-function-declaration,$(TEMPLATE_VBOXR0DRV_CFLAGS) $(TEMPLATE_VBOXR0DRV_CFLAGS.$(KBUILD_TARGET_ARCH))) -fno-exceptions -fno-rtti
+TEMPLATE_VBOXR0DRV_CXXFLAGS            = $(filter-out -Wstrict-prototypes -Wno-pointer-sign -ffreestanding -Wdeclaration-after-statement -Werror-implicit-function-declaration,$(TEMPLATE_VBOXR0DRV_CFLAGS) $(TEMPLATE_VBOXR0DRV_CFLAGS.$(KBUILD_TARGET_ARCH))) -fno-exceptions -fno-rtti -fpermissive
   ifndef VBOX_LINUX_VERSION_2_4
 # 2.6
 TEMPLATE_VBOXR0DRV_SYSSUFF             = .ko