diff --git a/src/osd/sdl/sdlprefix.h b/src/osd/sdl/sdlprefix.h
index 0678b3dd..11fc33e3 100644
--- a/src/osd/sdl/sdlprefix.h
+++ b/src/osd/sdl/sdlprefix.h
@@ -66,7 +66,6 @@
 #if defined(__EMSCRIPTEN__)
 #define SDLMAME_EMSCRIPTEN 1
 #define SDLMAME_NO64BITIO 1
-struct _IO_FILE {};  //_IO_FILE is an opaque type in the emscripten libc which makes clang cranky
 #endif
 
 #if defined(__ANDROID__)