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-rw-r--r--src/osd/sdl/sdl.mak3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/osd/sdl/sdl.mak b/src/osd/sdl/sdl.mak
index 48de1a5bf7f..96b407feda8 100644
--- a/src/osd/sdl/sdl.mak
+++ b/src/osd/sdl/sdl.mak
@@ -86,6 +86,9 @@ SDL_FRAMEWORK_PATH = /Library/Frameworks/
OSDSRC = $(SRC)/osd
OSDOBJ = $(OBJ)/osd
+# add a define identifying the target osd
+DEFS += -DOSD_SDL
+
# default to SDL2 for non-OS/2, non-Emscripten builds now
ifndef SDL_LIBVER
ifneq ($(TARGETOS),os2)