diff --git a/build/buildtools/modulerules.firm b/build/buildtools/modulerules.firm
index d09d9980..66815793 100644
--- a/build/buildtools/modulerules.firm
+++ b/build/buildtools/modulerules.firm
@@ -40,7 +40,7 @@ MAKEFIRM_DEFS	+= -DFIRM_ROOT='$(FIRM_ROOT)' \
 				-DMAKEFIRM_ARM7='$(basename $(MAKEFIRM_ARM7))' \
 				-DMAKEFIRM_RSA_PRVKEY='$(MAKEFIRM_RSA_PRVKEY)' \
 
-FIRM_SDEPENDS_BIN	= $(MAKEFIRM_RSA_PRVKEY)
+FIRM_SDEPENDS_BIN	= $(MAKEFIRM_RSA_PRVKEY) $(MAKEFIRM_ARM9) $(MAKEFIRM_ARM7)
 
 
 .PHONY: 	firmtop firmlib