1 files changed, 1 insertions, 0 deletions
diff --git a/mk/putc.d b/mk/putc.d
index 992a2c05..367a7979 100644
--- a/mk/putc.d
+++ b/mk/putc.d
@@ -3,6 +3,7 @@ libc.a(putc.o): $(OBJDIR)/putc.o
 	@$(AR) $(ARFLAGS) $@ $(OBJDIR)/$%
 
 $(OBJDIR)/putc.o: src/stdio/putc.c
+$(OBJDIR)/putc.o: src/stdio/_stdio.h
 $(OBJDIR)/putc.o:
 	@echo "  [CC] $@"
 	@mkdir -p $(@D)