diff --git a/debian/build/scripts/Makefile b/debian/build/scripts/Makefile
index 91aeba040..ab2a6a412 100644
--- a/debian/build/scripts/Makefile
+++ b/debian/build/scripts/Makefile
@@ -47,3 +47,5 @@ SUBDIRS = \
 OUTDIR = scripts
 
 include ..//Makefile.inc
+
+CPPFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64
diff --git a/debian/changelog b/debian/changelog
index 28a603de4..f5d30488b 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -7,6 +7,7 @@ linux-tools (4.0.2-1) UNRELEASED; urgency=medium
     commands
   * linux-tools: Set ARCH=x86 when building perf for amd64, i386 or x32
   * linux-kbuild: Include Makefile.kasan (Closes: #783681)
+  * linux-kbuild: Enable Large File Support (Closes: #778942)
 
  -- Ben Hutchings <ben@decadent.org.uk>  Mon, 11 May 2015 00:46:20 +0100