diff --git a/Utilities/KWIML/test/CMakeLists.txt b/Utilities/KWIML/test/CMakeLists.txt
index 4f6f37b4f72dfd605c40cd4e253ca3f4e0db471a..1bf93bb4e2366899faf45bba3422a2f7101b985b 100644
--- a/Utilities/KWIML/test/CMakeLists.txt
+++ b/Utilities/KWIML/test/CMakeLists.txt
@@ -10,7 +10,7 @@ endif()
 # Suppress printf/scanf format warnings; we test if the sizes match.
 foreach(lang C CXX)
   if(KWIML_LANGUAGE_${lang} AND CMAKE_${lang}_COMPILER_ID STREQUAL "GNU")
-    set(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} -Wno-format")
+    set(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} -Wno-format -Wno-format-security")
   endif()
 endforeach()