diff --git a/boards/arm/lpc31xx/ea3131/locked/Makefile b/boards/arm/lpc31xx/ea3131/locked/Makefile
index 19e67bd27da..f0584c6bca9 100644
--- a/boards/arm/lpc31xx/ea3131/locked/Makefile
+++ b/boards/arm/lpc31xx/ea3131/locked/Makefile
@@ -105,6 +105,7 @@ depend: .depend
 
 clean:
 	$(call DELFILE, locked.r)
+	$(call DELFILE, $(TOPDIR)$(DELIM)$(PASS1_SRCDIR)$(DELIM)locked.r)
 	$(call DELFILE, locked.map)
 	$(call CLEAN)