diff --git a/externals/tinyxml2/CMakeLists.txt b/externals/tinyxml2/CMakeLists.txt
index aa44e2411d0..01667886650 100644
--- a/externals/tinyxml2/CMakeLists.txt
+++ b/externals/tinyxml2/CMakeLists.txt
@@ -17,5 +17,6 @@ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     target_compile_options_safe(tinyxml2_objs -Wno-format-nonliteral)
     target_compile_options_safe(tinyxml2_objs -Wno-old-style-cast)
     target_compile_options_safe(tinyxml2_objs -Wno-inconsistent-missing-destructor-override)
+    target_compile_options_safe(tinyxml2_objs -Wno-format)
 endif()
 
diff --git a/lib/json.h b/lib/json.h
index 7ba7eac7743..4732c9a09cf 100644
--- a/lib/json.h
+++ b/lib/json.h
@@ -25,6 +25,7 @@ SUPPRESS_WARNING_PUSH("-Wfloat-equal")
 SUPPRESS_WARNING_CLANG_PUSH("-Wtautological-type-limit-compare")
 SUPPRESS_WARNING_CLANG_PUSH("-Wextra-semi-stmt")
 SUPPRESS_WARNING_CLANG_PUSH("-Wzero-as-null-pointer-constant")
+SUPPRESS_WARNING_CLANG_PUSH("-Wformat")
 
 #define PICOJSON_USE_INT64
 #include <picojson.h>
@@ -32,6 +33,7 @@ SUPPRESS_WARNING_CLANG_PUSH("-Wzero-as-null-pointer-constant")
 SUPPRESS_WARNING_CLANG_POP
 SUPPRESS_WARNING_CLANG_POP
 SUPPRESS_WARNING_CLANG_POP
+SUPPRESS_WARNING_CLANG_POP
 SUPPRESS_WARNING_POP
 
 #endif // jsonH