diff --git a/build-package.sh b/build-package.sh
index 142d6c0cb..a382020d7 100755
--- a/build-package.sh
+++ b/build-package.sh
@@ -221,7 +221,7 @@ termux_step_setup_variables() {
 	TERMUX_STANDALONE_TOOLCHAIN="$TERMUX_TOPDIR/_lib/${TERMUX_NDK_VERSION}-${TERMUX_ARCH}-${TERMUX_API_LEVEL}"
 	# Bump the below version if a change is made in toolchain setup to ensure
 	# that everyone gets an updated toolchain:
-	TERMUX_STANDALONE_TOOLCHAIN+="-v4"
+	TERMUX_STANDALONE_TOOLCHAIN+="-v5"
 
 	export prefix=${TERMUX_PREFIX}
 	export PREFIX=${TERMUX_PREFIX}
diff --git a/ndk-patches/bits-struct_file.h.patch b/ndk-patches/bits-struct_file.h.patch
index 87c7109b4..f4aae0f82 100644
--- a/ndk-patches/bits-struct_file.h.patch
+++ b/ndk-patches/bits-struct_file.h.patch
@@ -1,7 +1,7 @@
 diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/bits/struct_file.h ./usr/include/bits/struct_file.h
 --- /home/fornwall/lib/android-ndk/sysroot/usr/include/bits/struct_file.h	2017-06-20 17:41:56.000000000 +0200
 +++ ./usr/include/bits/struct_file.h	2017-06-26 13:35:19.040117023 +0200
-@@ -33,13 +33,74 @@
+@@ -33,13 +33,80 @@
  
  __BEGIN_DECLS
  
@@ -16,6 +16,12 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/bits/struct_file.h
 +	int	_size;
 +};
 +#endif
++
++#if defined(__LP64__)
++typedef int64_t _struct_file_off_t;
++#else
++typedef __kernel_off_t _struct_file_off_t;
++#endif
 +
  struct __sFILE {
 +	unsigned char *_p;	/* current position in (some) buffer */
@@ -38,7 +44,7 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/bits/struct_file.h
 +	void	*_cookie;	/* cookie passed to io functions */
 +	int	(*_close)(void *);
 +	int	(*_read)(void *, char *, int);
-+	off_t	(*_seek)(void *, off_t, int);
++	_struct_file_off_t	(*_seek)(void *, _struct_file_off_t, int);
 +	int	(*_write)(void *, const char *, int);
 +
 +	/* extension data, to avoid further ABI breakage */
@@ -56,7 +62,7 @@ diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/bits/struct_file.h
 +
 +	/* Unix stdio files get aligned to block boundaries on fseek() */
 +	int	_blksize;	/* stat.st_blksize (may be != _bf._size) */
-+	off_t	_offset;	/* current lseek offset */
++	_struct_file_off_t	_offset;	/* current lseek offset */
 +};
 +
 +#define	__SLBF	0x0001		/* line buffered */
diff --git a/packages/ndk-sysroot/build.sh b/packages/ndk-sysroot/build.sh
index 218a0f072..549b5b780 100644
--- a/packages/ndk-sysroot/build.sh
+++ b/packages/ndk-sysroot/build.sh
@@ -1,6 +1,7 @@
 TERMUX_PKG_HOMEPAGE=https://developer.android.com/tools/sdk/ndk/index.html
 TERMUX_PKG_DESCRIPTION="System header and library files from the Android NDK needed for compiling C programs"
 TERMUX_PKG_VERSION=$TERMUX_NDK_VERSION
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_NO_DEVELSPLIT=yes
 # Depend on libandroid-support-dev so that iconv.h and libintl.h are available:
 TERMUX_PKG_DEPENDS="libandroid-support-dev"