diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5ecd89e..7c19654 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -67,6 +67,10 @@
 set(CMAKE_C_FLAGS_MINSIZEREL "${CMAKE_C_FLAGS_MINSIZEREL} -UNDEBUG")
 set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} -UNDEBUG")
 
+# Tell the compiler to be stringent
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wformat=2")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wformat=2")
+
 if(NOT DEFINED BUILD_WINVNC)
   set(BUILD_WINVNC 1)
 endif()