diff -Nru virtualbox-lts-xenial-4.3.40-dfsg/debian/changelog virtualbox-lts-xenial-4.3.40-dfsg/debian/changelog
--- virtualbox-lts-xenial-4.3.40-dfsg/debian/changelog	2019-03-01 15:13:03.000000000 +0100
+++ virtualbox-lts-xenial-4.3.40-dfsg/debian/changelog	2019-02-28 18:14:33.000000000 +0100
@@ -1,3 +1,11 @@
+virtualbox-lts-xenial (4.3.40-dfsg-0ubuntu1.14.04.1~14.04.5) trusty; urgency=medium
+
+  * debian/patches/fix-compile-for-xenial-kernel.patch
+    - Fix for LP: #1818049 (virtualbox dkms modules fail to build with
+      linux 4.4.0-143.169)
+
+ -- Kleber Sacilotto de Souza <kleber.souza@canonical.com>  Thu, 28 Feb 2019 18:14:33 +0100
+
 virtualbox-lts-xenial (4.3.40-dfsg-0ubuntu1.14.04.1~14.04.4) trusty; urgency=medium
 
   * Use lts-xenial stack. Build only guest additions (LP: #1424769).
diff -Nru virtualbox-lts-xenial-4.3.40-dfsg/debian/patches/fix-compile-for-xenial-kernel.patch virtualbox-lts-xenial-4.3.40-dfsg/debian/patches/fix-compile-for-xenial-kernel.patch
--- virtualbox-lts-xenial-4.3.40-dfsg/debian/patches/fix-compile-for-xenial-kernel.patch	1970-01-01 01:00:00.000000000 +0100
+++ virtualbox-lts-xenial-4.3.40-dfsg/debian/patches/fix-compile-for-xenial-kernel.patch	2019-02-28 18:14:33.000000000 +0100
@@ -0,0 +1,18 @@
+--- a/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
++++ b/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
+@@ -1071,8 +1071,15 @@ DECLHIDDEN(int) rtR0MemObjNativeLockUser
+                                 pTask->mm,              /* Whose pages. */
+                                 R3Ptr,                  /* Where from. */
+                                 cPages,                 /* How many pages. */
++# if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 168)) && \
++     (LINUX_VERSION_CODE < KERNEL_VERSION(4, 5, 0))
++                                fWrite ? FOLL_WRITE |   /* Write to memory. */
++                                  FOLL_FORCE     /* force write access. */
++                                  : 0,
++# else
+                                 fWrite,                 /* Write to memory. */
+                                 fWrite,                 /* force write access. */
++# endif
+                                 &pMemLnx->apPages[0],   /* Page array. */
+                                 papVMAs);               /* vmas */
+ #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0) */
diff -Nru virtualbox-lts-xenial-4.3.40-dfsg/debian/patches/series virtualbox-lts-xenial-4.3.40-dfsg/debian/patches/series
--- virtualbox-lts-xenial-4.3.40-dfsg/debian/patches/series	2019-03-01 15:13:03.000000000 +0100
+++ virtualbox-lts-xenial-4.3.40-dfsg/debian/patches/series	2019-02-28 18:14:33.000000000 +0100
@@ -15,3 +15,4 @@
 35-libvdeplug-soname.patch
 36-fix-vnc-version-string.patch
 fix-guest-to-host-escape-vulnerability.patch
+fix-compile-for-xenial-kernel.patch