diff --git a/fpga/usrp2/top/Makefile.common b/fpga/usrp2/top/Makefile.common
index 3a35e71..894cd86 100644
--- a/fpga/usrp2/top/Makefile.common
+++ b/fpga/usrp2/top/Makefile.common
@@ -50,11 +50,11 @@ clean:
 # Dependency Targets
 ##################################################
 .SECONDEXPANSION:
-$(ISE_FILE): $$(SOURCES) $$(MAKEFILE_LIST)
+$(ISE_FILE): $(SOURCES) $$(MAKEFILE_LIST)
        @echo $@
        $(ISE_HELPER) ""

-$(BIN_FILE): $(ISE_FILE) $$(SOURCES) $$(MAKEFILE_LIST)
+$(BIN_FILE): $(ISE_FILE) $(SOURCES) $$(MAKEFILE_LIST)
        @echo $@
        $(ISE_HELPER) "Generate Programming File"
        touch $@