diff --git a/makefile b/makefile
index a3a79e5f3..f34dc4727 100644
--- a/makefile
+++ b/makefile
@@ -163,7 +163,7 @@ utils/translit.c: transtab
 # available), remove */*.[ch] from the line below.
 # Under RISC OS, you may require *Set UnixFS$sfix "", if perl gives
 # "No such file or directory" errors.
-depend: 
+depend: */*.[ch]
 	@echo "--> modified files $?"
 	@echo "--> updating dependencies"
 	@-mkdir -p $(OBJDIR_RISCOS) $(OBJDIR_NCOS) $(OBJDIR_DEBUG) $(OBJDIR_GTK)