diff --git a/README.SRC b/README.SRC
index 23b3f2f8..47efa57e 100644
--- a/README.SRC
+++ b/README.SRC
@@ -75,7 +75,8 @@ Tools needed to build/modify the UPX sources
 To compile the packer sources
 -----------------------------
 
-  set the environment variable UPX_UCLDIR to point to your UCL installation, e.g.
+  set the environment variable UPX_UCLDIR to point to your
+  UCL installation, e.g.
 
      set UPX_UCLDIR=c:\src\ucl-1.03                   (DOS / Windows)
      export UPX_UCLDIR=$HOME/local/src/ucl-1.03       (Unix)
@@ -99,6 +100,15 @@ If you want to modify the stub sources you'll also need
   - ASM5900 - a MIPS R3000 assembler
     http://upx.sourceforge.net/download/tools/
 
+  - binutils-multiarch-2.17
+    http://ftp.gnu.org/gnu/binutils/binutils-2.17.tar.bz2
+
+      You have to configure binutils with something like:
+        --enable-64-bit-bfd --enable-targets=all --disable-nls \
+        --disable-shared \
+        --program-prefix=multiarch- --program-suffix=-2.17 \
+        --prefix=/home/local/packages/binutils-multiarch-2.17-upx
+
   - djasm - an assembler for the djgpp stub
     http://upx.sourceforge.net/download/tools/
 
@@ -135,6 +145,24 @@ If you want to modify the stub sources you'll also need
       bin-upx/i386-linux-ld-2.16.1
       bin-upx/i386-linux-objcopy-2.16.1
       bin-upx/i386-linux-objdump
+      bin-upx/multiarch-addr2line-2.17
+      bin-upx/multiarch-ar-2.17
+      bin-upx/multiarch-as-2.17
+      bin-upx/multiarch-c++filt-2.17
+      bin-upx/multiarch-coffdump-2.17
+      bin-upx/multiarch-gprof-2.17
+      bin-upx/multiarch-ld-2.17
+      bin-upx/multiarch-nlmconv-2.17
+      bin-upx/multiarch-nm-2.17
+      bin-upx/multiarch-objcopy-2.17
+      bin-upx/multiarch-objdump-2.17
+      bin-upx/multiarch-ranlib-2.17
+      bin-upx/multiarch-readelf-2.17
+      bin-upx/multiarch-size-2.17
+      bin-upx/multiarch-srconv-2.17
+      bin-upx/multiarch-strings-2.17
+      bin-upx/multiarch-strip-2.17
+      bin-upx/multiarch-sysdump-2.17
       bin-upx/nasm
       bin-upx/powerpc-750-linux-gnu-gcc-3.4.4
       bin-upx/powerpc-750-linux-gnu-ld