diff --git a/extra/chmlib/PKGBUILD b/extra/chmlib/PKGBUILD
index 8aed88be0..e92cf342c 100644
--- a/extra/chmlib/PKGBUILD
+++ b/extra/chmlib/PKGBUILD
@@ -17,7 +17,7 @@ depends=('glibc')
 source=("http://morte.jedrea.com/~jedwin/projects/${pkgname}/${pkgname}-${pkgver}.tar.bz2"
         "arm.patch")
 md5sums=('7ea49ed8c335215c1edc6fae83e6b912'
-         'aae01483e3fc2d37ee1984cb936e58f3')
+         'c955ee2709b5d4d1dc29751d941d5c81')
 build() {
   cd "${srcdir}"/${pkgname}-${pkgver}
 
diff --git a/extra/chmlib/arm.patch b/extra/chmlib/arm.patch
index e9674aace..d833d0eef 100644
--- a/extra/chmlib/arm.patch
+++ b/extra/chmlib/arm.patch
@@ -1,6 +1,6 @@
-diff -urN chmlib-0.40.orig/src/chm_lib.c chmlib-0.40/src/chm_lib.c
---- chmlib-0.40.orig/src/chm_lib.c	2009-05-23 08:43:31.000000000 -0600
-+++ chmlib-0.40/src/chm_lib.c	2011-01-21 17:42:45.000000000 -0700
+diff -urN a/src/chm_lib.c b/src/chm_lib.c
+--- a/src/chm_lib.c	2009-05-23 08:43:31.000000000 -0600
++++ b/src/chm_lib.c	2015-07-18 14:15:00.588557608 -0600
 @@ -153,7 +153,7 @@
  /* Sparc        */
  /* MIPS         */
@@ -10,3 +10,12 @@ diff -urN chmlib-0.40.orig/src/chm_lib.c chmlib-0.40/src/chm_lib.c
  typedef unsigned char           UChar;
  typedef short                   Int16;
  typedef unsigned short          UInt16;
+@@ -164,7 +164,7 @@
+ 
+ /* x86-64 */
+ /* Note that these may be appropriate for other 64-bit machines. */
+-#elif __x86_64__ || __ia64__
++#elif __x86_64__ || __ia64__ || __aarch64__
+ typedef unsigned char           UChar;
+ typedef short                   Int16;
+ typedef unsigned short          UInt16;