diff --git a/examples/c++/CMakeLists.txt b/examples/c++/CMakeLists.txt
index 6ec3ab7..95a337f 100644
--- a/examples/c++/CMakeLists.txt
+++ b/examples/c++/CMakeLists.txt
@@ -9,5 +9,5 @@ include_directories(${PROJECT_SOURCE_DIR}/api)
 target_link_libraries (AioA0 maa stdc++)
 target_link_libraries (blink-io-cpp maa stdc++)
 target_link_libraries (Pwm3-cycle maa stdc++)
-target_link_libraries (I2c-compass maa stdc++)
+target_link_libraries (I2c-compass maa stdc++ m)
 target_link_libraries (Spi-pot maa stdc++)