diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3ce097ec5c..46623b5265 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -185,6 +185,7 @@ add_compile_options(
     -Wpointer-arith
     -Wno-nonnull
     -Wshadow
+    -Wconversion
     -Wformat
     #-----------------------------------
     # Configure compiler settings.