diff --git a/debian/changelog b/debian/changelog
index 7c9b15f0..29fa8755 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+llvm-toolchain-3.4 (1:3.4~+rc2-4) UNRELEASED; urgency=low
+
+  * Relative call in the chroot without proc failed.
+    See: fix-an-issue-in-chroot-witout-proc.diff
+
+ -- Sylvestre Ledru <sylvestre@debian.org>  Mon, 09 Dec 2013 17:37:49 +0100
+
 llvm-toolchain-3.4 (1:3.4~+rc2-3) unstable; urgency=low
 
   * Fix the bad declaration on the lldb desactivation
diff --git a/debian/patches/fix-an-issue-in-chroot-witout-proc.diff b/debian/patches/fix-an-issue-in-chroot-witout-proc.diff
new file mode 100644
index 00000000..631303a9
--- /dev/null
+++ b/debian/patches/fix-an-issue-in-chroot-witout-proc.diff
@@ -0,0 +1,61 @@
+Index: llvm-toolchain-3.4-3.4~+rc1/lib/Support/Unix/Path.inc
+===================================================================
+--- llvm-toolchain-3.4-3.4~+rc1.orig/lib/Support/Unix/Path.inc	(révision 196790)
++++ llvm-toolchain-3.4-3.4~+rc1/lib/Support/Unix/Path.inc	(révision 196791)
+@@ -184,15 +184,15 @@
+     defined(__OpenBSD__) || defined(__minix) || defined(__FreeBSD_kernel__) || \
+     defined(__linux__) || defined(__CYGWIN__) || defined(__DragonFly__)
+ static int
+-test_dir(char buf[PATH_MAX], char ret[PATH_MAX],
+-    const char *dir, const char *bin)
+-{
++test_dir(char ret[PATH_MAX], const char *dir, const char *bin)
++{  
+   struct stat sb;
++  char fullpath[PATH_MAX];
+ 
+-  snprintf(buf, PATH_MAX, "%s/%s", dir, bin);
+-  if (realpath(buf, ret) == NULL)
++  snprintf(fullpath, PATH_MAX, "%s/%s", dir, bin);
++  if (realpath(fullpath, ret) == NULL)
+     return (1);
+-  if (stat(buf, &sb) != 0)
++  if (stat(fullpath, &sb) != 0)
+     return (1);
+ 
+   return (0);
+@@ -201,20 +201,21 @@
+ static char *
+ getprogpath(char ret[PATH_MAX], const char *bin)
+ {
+-  char *pv, *s, *t, buf[PATH_MAX];
++  char *pv, *s, *t;
+ 
+   /* First approach: absolute path. */
+   if (bin[0] == '/') {
+-    if (test_dir(buf, ret, "/", bin) == 0)
++    if (test_dir(ret, "/", bin) == 0)
+       return (ret);
+     return (NULL);
+   }
+ 
+   /* Second approach: relative path. */
+   if (strchr(bin, '/') != NULL) {
+-    if (getcwd(buf, PATH_MAX) == NULL)
++    char cwd[PATH_MAX];
++    if (getcwd(cwd, PATH_MAX) == NULL)
+       return (NULL);
+-    if (test_dir(buf, ret, buf, bin) == 0)
++    if (test_dir(ret, cwd, bin) == 0)
+       return (ret);
+     return (NULL);
+   }
+@@ -226,7 +227,7 @@
+   if (pv == NULL)
+     return (NULL);
+   while ((t = strsep(&s, ":")) != NULL) {
+-    if (test_dir(buf, ret, t, bin) == 0) {
++    if (test_dir(ret, t, bin) == 0) {
+       free(pv);
+       return (ret);
+     }
diff --git a/debian/patches/series b/debian/patches/series
index d3485c7a..148f8e9d 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -32,3 +32,4 @@ debian-mips64-n32-multiarch.diff
 
 force-gcc-header-obj.diff
 do-not-fail-on-unexpected-pass.diff
+fix-an-issue-in-chroot-witout-proc.diff