diff --git a/CMakeLists.txt b/CMakeLists.txt
index 18527b5..20a1242 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -78,7 +78,7 @@ ENDMACRO(COMPARE_VERSION_STRINGS)
 ####################################
 
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -fno-strict-overflow -pedantic -Wall -Wextra -Wformat=2 -Wformat-nonliteral -Wformat-security -Wshadow -Wpointer-arith -Wmissing-prototypes -D_GNU_SOURCE -DNK_USE_CAPABILITY")
-set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -fno-strict-overflow -pedantic -Wall -Wextra -Wformat=2 -Wformat-nonliteral -Wformat-security -Wshadow -Wpointer-arith -Wmissing-prototypes -D_GNU_SOURCE -DNK_USE_CAPABILITY")
+set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -fno-strict-overflow -pedantic -Wall -Wextra -Wformat-security -Wshadow -Wpointer-arith -Wmissing-prototypes -D_GNU_SOURCE -DNK_USE_CAPABILITY")
 
 if (WIN32)
   set(OSNAME "Win32")