diff --git a/tools/mkimage/patches/110-fix_musl_build.patch b/tools/mkimage/patches/110-fix_musl_build.patch
new file mode 100644
index 0000000000..13f7ab0431
--- /dev/null
+++ b/tools/mkimage/patches/110-fix_musl_build.patch
@@ -0,0 +1,67 @@
+From: Jörg Krause <joerg.krause@embedded.rocks>
+Date: Wed, 22 Apr 2015 19:36:22 +0000 (+0200)
+Subject: Fix musl build
+X-Git-Tag: v2015.07-rc2~281
+X-Git-Url: http://git.denx.de/?p=u-boot.git;a=commitdiff_plain;h=26e355d131a6b56ea78a156c1cee4f6ba0500b37;hp=1cdd9412002000aafcfb6f10cd02069adc66ba49
+
+Fix musl build
+
+This patch fixes cross-compiling U-Boot tools with the musl C library:
+  * including <sys/types.h> is needed for ulong
+  * defining _GNU_SOURCE is needed for loff_t
+
+Tested for target at91sam9261ek_dataflash_cs3.
+
+Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
+Cc: Tom Rini <trini@konsulko.com>
+---
+
+diff --git a/include/image.h b/include/image.h
+index 3844be6..60b924a 100644
+--- a/include/image.h
++++ b/include/image.h
+@@ -23,6 +23,7 @@
+ struct lmb;
+ 
+ #ifdef USE_HOSTCC
++#include <sys/types.h>
+ 
+ /* new uImage format support enabled on host */
+ #define CONFIG_FIT		1
+diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c
+index 1173eea..daa02a7 100644
+--- a/tools/env/fw_env.c
++++ b/tools/env/fw_env.c
+@@ -8,6 +8,8 @@
+  * SPDX-License-Identifier:	GPL-2.0+
+  */
+ 
++#define _GNU_SOURCE
++
+ #include <errno.h>
+ #include <env_flags.h>
+ #include <fcntl.h>
+diff --git a/tools/imagetool.h b/tools/imagetool.h
+index 3e15b4e..b7874f4 100644
+--- a/tools/imagetool.h
++++ b/tools/imagetool.h
+@@ -16,6 +16,7 @@
+ #include <stdlib.h>
+ #include <string.h>
+ #include <sys/stat.h>
++#include <sys/types.h>
+ #include <time.h>
+ #include <unistd.h>
+ #include <u-boot/sha1.h>
+diff --git a/tools/proftool.c b/tools/proftool.c
+index 3482951..9ce7a77 100644
+--- a/tools/proftool.c
++++ b/tools/proftool.c
+@@ -16,6 +16,7 @@
+ #include <string.h>
+ #include <unistd.h>
+ #include <sys/param.h>
++#include <sys/types.h>
+ 
+ #include <compiler.h>
+ #include <trace.h>