diff --git a/renderdoc/CMakeLists.txt b/renderdoc/CMakeLists.txt
index 6f997ab41..c3a90fd47 100644
--- a/renderdoc/CMakeLists.txt
+++ b/renderdoc/CMakeLists.txt
@@ -205,6 +205,9 @@ if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR APPLE)
     if(CMAKE_COMPILER_IS_GNUCXX)
         set_property(SOURCE 3rdparty/jpeg-compressor/jpgd.cpp
             APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-unknown-warning -Wno-implicit-fallthrough")
+
+        set_property(SOURCE serialise/utf8printf.cpp
+            APPEND_STRING PROPERTY COMPILE_FLAGS " -Wno-unknown-warning -Wno-format-truncation")
     endif()
 endif()