diff --git a/package/tcl/0001-dont-build-compat.patch b/package/tcl/0001-dont-build-compat.patch
index c0d5d85da7..7a7d959cd2 100644
--- a/package/tcl/0001-dont-build-compat.patch
+++ b/package/tcl/0001-dont-build-compat.patch
@@ -7,7 +7,7 @@ anything buildroot is using as a standard C library will be good enough
 to not have broken behavior.
 
 Signed-off-by: Andrew Ruder <andrew.ruder@elecsyscorp.com>
-[Fabrice: Update for 8.6.9]
+[Fabrice: Update for 8.6.12]
 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
 ---
 
@@ -15,11 +15,11 @@ diff --git a/unix/tcl.m4 b/unix/tcl.m4
 --- a/unix/tcl.m4
 +++ b/unix/tcl.m4
 @@ -2725,7 +2725,7 @@ AC_DEFUN([SC_TCL_CHECK_BROKEN_FUNC],[
-     if test ["$tcl_ok"] = 1; then
- 	AC_CACHE_CHECK([proper ]$1[ implementation], [tcl_cv_]$1[_unbroken],
- 	    AC_TRY_RUN([[int main() {]$2[}]],[tcl_cv_]$1[_unbroken]=ok,
--		[tcl_cv_]$1[_unbroken]=broken,[tcl_cv_]$1[_unbroken]=unknown))
-+		[tcl_cv_]$1[_unbroken]=broken,[tcl_cv_]$1[_unbroken]=ok))
- 	if test ["$tcl_cv_]$1[_unbroken"] = "ok"; then
+ #include <stdlib.h>
+ #include <string.h>
+ int main() {]$2[}]]])],[tcl_cv_$1_unbroken=ok],
+-		[tcl_cv_$1_unbroken=broken],[tcl_cv_$1_unbroken=unknown]))
++		[tcl_cv_$1_unbroken=broken],[tcl_cv_$1_unbroken=unknown]))
+	if test ["$tcl_cv_]$1[_unbroken"] = "ok"; then
  	    tcl_ok=1
  	else
diff --git a/package/tcl/tcl.hash b/package/tcl/tcl.hash
index 913190b95c..2b82a1938b 100644
--- a/package/tcl/tcl.hash
+++ b/package/tcl/tcl.hash
@@ -1,3 +1,3 @@
 # Locally calculated
-sha256 ad0cd2de2c87b9ba8086b43957a0de3eb2eb565c7159d5f53ccbba3feb915f4e  tcl8.6.9-src.tar.gz
-sha256 c0a69a2bfd757361ec7e6143973b103c90409316b49e9c88db26ad6388e79f16  license.terms
+sha256  26c995dd0f167e48b11961d891ee555f680c175f7173ff8cb829f4ebcde4c1a6  tcl8.6.12-src.tar.gz
+sha256  c0a69a2bfd757361ec7e6143973b103c90409316b49e9c88db26ad6388e79f16  license.terms
diff --git a/package/tcl/tcl.mk b/package/tcl/tcl.mk
index 7c456e89b3..97754b63d0 100644
--- a/package/tcl/tcl.mk
+++ b/package/tcl/tcl.mk
@@ -5,7 +5,7 @@
 ################################################################################
 
 TCL_VERSION_MAJOR = 8.6
-TCL_VERSION = $(TCL_VERSION_MAJOR).9
+TCL_VERSION = $(TCL_VERSION_MAJOR).12
 TCL_SOURCE = tcl$(TCL_VERSION)-src.tar.gz
 TCL_SITE = http://downloads.sourceforge.net/project/tcl/Tcl/$(TCL_VERSION)
 TCL_LICENSE = TCL