diff --git a/evgMrmApp/Db/Makefile b/evgMrmApp/Db/Makefile
index b9c6b316..aae91565 100644
--- a/evgMrmApp/Db/Makefile
+++ b/evgMrmApp/Db/Makefile
@@ -31,10 +31,10 @@ DB += cpci-evg-300.db
 DB += vme-evg230.db
 DB += vme-evg230-nsls2.db
 DB += mtca-evm-300.db
-ifeq ($(shell echo "$(BASE) > 3.14" | bc),1)
+ifndef BASE_3_14
 DB += evm-mtca-300.db
 DB += evm-mtca-300-evr.db
-endif
+endif # BASE_3_14
 
 ifneq ($(DEVIOCSTATS),)
 ifeq ($(OS_CLASS), RTEMS)
diff --git a/evrMrmApp/Db/Makefile b/evrMrmApp/Db/Makefile
index 6d5abe30..79ad26b3 100644
--- a/evrMrmApp/Db/Makefile
+++ b/evrMrmApp/Db/Makefile
@@ -21,7 +21,7 @@ DB += evr-tg-300.db
 DB += evr-mtca-300.db
 DB += evr-pcie-300dc.db
 
-ifeq ($(shell echo "$(BASE) > 3.14" | bc),1)
+ifndef BASE_3_14
 DB += evr-300.db
 endif