diff --git a/src/Rules.LXcray.mk b/src/Rules.LXcray.mk
index ed7d4b9e6f471cf0145bd82a06284134c0b037f3..1fbd6578c079a9edf04324e5b4e2c00132417628 100644
--- a/src/Rules.LXcray.mk
+++ b/src/Rules.LXcray.mk
@@ -63,7 +63,7 @@ OPT_NOCB  = $(OPT_BASE) $(OPT_PERF1)
 endif
 #
 #
-FC = ftn
+FC = ftn -em -ef
 FCFLAGS = -em -ef
 CC=gcc
 export FC CC FCFLAGS
@@ -98,6 +98,11 @@ endif
 #
 TARGET_GRIBEX=linux
 CNAME_GRIBEX=_gfortran
+#
+# GRIB_API
+#
+GRIBAPI_CONF="FCFLAGS= -em -ef "
+
 #
 # LIBTOOLS flags
 #