diff --git a/applications/message_process/CMakeLists.txt b/applications/message_process/CMakeLists.txt
index 2f7e5cf..ed27dcd 100644
--- a/applications/message_process/CMakeLists.txt
+++ b/applications/message_process/CMakeLists.txt
@@ -16,6 +16,6 @@
 # limitations under the License.
 #
 
-add_library(message_process STATIC src/message_process.cc)
+add_library(message_process STATIC src/message_process.cpp)
 target_include_directories(message_process PUBLIC include ${LINUX_DRIVER_STACK_PATH}/kernel)
 target_link_libraries(message_process PRIVATE cmsis_core inference_process ethosu_mailbox)