diff -Nru virtualbox-5.1.38-dfsg/debian/changelog virtualbox-5.1.38-dfsg/debian/changelog
--- virtualbox-5.1.38-dfsg/debian/changelog	2019-01-17 18:31:40.000000000 +0100
+++ virtualbox-5.1.38-dfsg/debian/changelog	2019-02-28 12:54:05.000000000 +0100
@@ -1,3 +1,11 @@
+virtualbox (5.1.38-dfsg-0ubuntu1.16.04.3) xenial; 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 12:52:28 +0100
+
 virtualbox (5.1.38-dfsg-0ubuntu1.16.04.2) xenial-security; urgency=medium
 
   * debian/patches/fix-for-guest-to-host-escape-vulnerability.patch:
diff -Nru virtualbox-5.1.38-dfsg/debian/patches/fix-compile-for-xenial-kernel.patch virtualbox-5.1.38-dfsg/debian/patches/fix-compile-for-xenial-kernel.patch
--- virtualbox-5.1.38-dfsg/debian/patches/fix-compile-for-xenial-kernel.patch	1970-01-01 01:00:00.000000000 +0100
+++ virtualbox-5.1.38-dfsg/debian/patches/fix-compile-for-xenial-kernel.patch	2019-02-28 12:57:56.000000000 +0100
@@ -0,0 +1,38 @@
+Description: fix compilation after get_user_pages() API change
+Author: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
+===================================================================
+--- a/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
++++ b/src/VBox/Runtime/r0drv/linux/memobj-r0drv-linux.c
+@@ -1074,7 +1074,9 @@
+         if (R0Process == RTR0ProcHandleSelf())
+             rc = get_user_pages(R3Ptr,                  /* Where from. */
+                                 cPages,                 /* How many pages. */
+-# if GET_USER_PAGES_API >= KERNEL_VERSION(4, 9, 0)
++# if (GET_USER_PAGES_API >= KERNEL_VERSION(4, 9, 0)) || \
++     ((GET_USER_PAGES_API >= KERNEL_VERSION(4, 4, 168)) && \
++      (GET_USER_PAGES_API < KERNEL_VERSION(4, 5, 0)))
+                                 fWrite ? FOLL_WRITE |   /* Write to memory. */
+                                          FOLL_FORCE     /* force write access. */
+                                        : 0,             /* Write to memory. */
+@@ -1094,7 +1096,9 @@
+                                 pTask->mm,              /* Whose pages. */
+                                 R3Ptr,                  /* Where from. */
+                                 cPages,                 /* How many pages. */
+-# if GET_USER_PAGES_API >= KERNEL_VERSION(4, 9, 0)
++# if (GET_USER_PAGES_API >= KERNEL_VERSION(4, 9, 0)) || \
++     ((GET_USER_PAGES_API >= KERNEL_VERSION(4, 4, 168)) && \
++      (GET_USER_PAGES_API < KERNEL_VERSION(4, 5, 0)))
+                                 fWrite ? FOLL_WRITE |   /* Write to memory. */
+                                          FOLL_FORCE     /* force write access. */
+                                        : 0,             /* Write to memory. */
+@@ -1113,7 +1117,9 @@
+                                 pTask->mm,              /* Whose pages. */
+                                 R3Ptr,                  /* Where from. */
+                                 cPages,                 /* How many pages. */
+-# if GET_USER_PAGES_API >= KERNEL_VERSION(4, 9, 0)
++# if (GET_USER_PAGES_API >= KERNEL_VERSION(4, 9, 0)) || \
++     ((GET_USER_PAGES_API >= KERNEL_VERSION(4, 4, 168)) && \
++      (GET_USER_PAGES_API < KERNEL_VERSION(4, 5, 0)))
+                                 fWrite ? FOLL_WRITE |   /* Write to memory. */
+                                          FOLL_FORCE     /* force write access. */
+                                        : 0,             /* Write to memory. */
diff -Nru virtualbox-5.1.38-dfsg/debian/patches/series virtualbox-5.1.38-dfsg/debian/patches/series
--- virtualbox-5.1.38-dfsg/debian/patches/series	2019-01-17 18:31:40.000000000 +0100
+++ virtualbox-5.1.38-dfsg/debian/patches/series	2019-02-28 12:48:26.000000000 +0100
@@ -18,3 +18,4 @@
 37-python-3.6-support.patch
 69989.patch
 fix-guest-to-host-escape-vulnerability.patch
+fix-compile-for-xenial-kernel.patch