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-rw-r--r--fpga/usrp2/top/Makefile.common3
1 files changed, 2 insertions, 1 deletions
diff --git a/fpga/usrp2/top/Makefile.common b/fpga/usrp2/top/Makefile.common
index d1c89fdfb..d0435fa1e 100644
--- a/fpga/usrp2/top/Makefile.common
+++ b/fpga/usrp2/top/Makefile.common
@@ -42,7 +42,8 @@ clean:
##################################################
# Dependency Targets
##################################################
-$(ISE_FILE): $(SOURCES)
+.SECONDEXPANSION:
+$(ISE_FILE): $$(SOURCES) $$(MAKEFILE_LIST)
@echo $@
$(ISE_HELPER) ""