diff --git a/CMakeLists.txt b/CMakeLists.txt
index c3f3e803a19..0acb9414422 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -184,6 +184,7 @@ add_compile_options(
     -Wpointer-arith
     -Wno-nonnull
     -Wshadow
+    -Wconversion
     -Wformat
     #-----------------------------------
     # Configure compiler settings.