1 files changed, 1 insertions, 1 deletions

diff --git a/uisimulator/win32/Makefile b/uisimulator/win32/Makefile
index 6e377a9ac6..6daf8d70e1 100644
--- a/uisimulator/win32/Makefile
+++ b/uisimulator/win32/Makefile
@@ -86,7 +86,7 @@ endif
 
 SRCS = button.c dir-win32.c lcd-win32.c panic-win32.c thread-win32.c \
         debug-win32.c kernel.c string-win32.c uisw32.c stubs.c \
-        $(APPS) $(MENUS) $(FIRMSRCS) strtok.c sim_icons.c
+        $(APPS) $(MENUS) $(FIRMSRCS) strtok.c sim_icons.c io.c
 
 OBJS := $(OBJDIR)/lang.o $(SRCS:%.c=$(OBJDIR)/%.o) $(OBJDIR)/uisw32-res.o