diff --git a/devices/genet/Kbuild.in b/devices/genet/Kbuild.in
index 425808b1..077c834c 100644
--- a/devices/genet/Kbuild.in
+++ b/devices/genet/Kbuild.in
@@ -23,6 +23,9 @@
 #
 #-----------------------------------------------------------------------------
 
+src := @abs_srcdir@
+ccflags-y := -I@abs_top_builddir@
+
 TOPDIR := $(src)/../..
 
 REV := $(shell if test -s $(TOPDIR)/revision; then \
diff --git a/devices/igc/Kbuild.in b/devices/igc/Kbuild.in
index 201ff013..84999004 100644
--- a/devices/igc/Kbuild.in
+++ b/devices/igc/Kbuild.in
@@ -23,6 +23,9 @@
 #
 #-----------------------------------------------------------------------------
 
+src := @abs_srcdir@
+ccflags-y := -I@abs_top_builddir@
+
 TOPDIR := $(src)/../..
 
 REV := $(shell if test -s $(TOPDIR)/revision; then \
diff --git a/devices/r8169/Kbuild.in b/devices/r8169/Kbuild.in
index 1e55f6ef..b74dfe8e 100644
--- a/devices/r8169/Kbuild.in
+++ b/devices/r8169/Kbuild.in
@@ -23,6 +23,9 @@
 #
 #-----------------------------------------------------------------------------
 
+src := @abs_srcdir@
+ccflags-y := -I@abs_top_builddir@
+
 TOPDIR := $(src)/../..
 
 REV := $(shell if test -s $(TOPDIR)/revision; then \
diff --git a/devices/stmmac/Kbuild.in b/devices/stmmac/Kbuild.in
index 60564fb4..97e3aa49 100644
--- a/devices/stmmac/Kbuild.in
+++ b/devices/stmmac/Kbuild.in
@@ -31,6 +31,9 @@
 #
 #-----------------------------------------------------------------------------
 
+src := @abs_srcdir@
+ccflags-y := -I@abs_top_builddir@
+
 TOPDIR := $(src)/../..
 
 REV := $(shell if test -s $(TOPDIR)/revision; then \