diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 443b075e..a58be964 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -6,6 +6,7 @@ RTOS Framework change log
 
   * FIXED: Added dummy definitions of vTaskCoreAffinitySet() and vTaskCoreAffinitySet() functions to
     avoid warnings when configNUM_CORES is set to 1.
+  * UPDATED: Updated xmos_cmake_toolchain to v1.0.0 from untagged commit e577fbc
   * UPDATED: Tested against fwk_io v3.3.0 updated from v3.0.1
   * UPDATED: Tested against fwk_core v1.0.2 updated from v1.0.0
   * ADDED: Runtime check for I2S RPC functions called for I2S Slave
diff --git a/xmos_cmake_toolchain b/xmos_cmake_toolchain
index e577fbcf..ea6b9c4b 160000
--- a/xmos_cmake_toolchain
+++ b/xmos_cmake_toolchain
@@ -1 +1 @@
-Subproject commit e577fbcf147346264dbe25f82c5cc0e46e648cd6
+Subproject commit ea6b9c4b7bd99044953b7dcdecc9768e737a5635