diff --git a/etc/vmc/Makefile.macosx64 b/etc/vmc/Makefile.macosx64
index f153c1ef3b8a944368c69b8e0cbf619fdec163be..31e2e81a9a1a871b7ae282d8b0e2da01c9a038e8 100644
--- a/etc/vmc/Makefile.macosx64
+++ b/etc/vmc/Makefile.macosx64
@@ -63,7 +63,7 @@ SOFLAGS       = -m64 -dynamiclib -undefined dynamic_lookup -single_module
 ifeq (g95,$(findstring g95,$(ROOTBUILD)))
 SHLIB += -L$(shell g95 --print-search-dirs | sed -n -e 's/install: //p') -lf95
 else
-SHLIB := $(shell gfortran -print-file-name=libgfortran.dylib)
-SHLIB += $(shell gfortran -print-file-name=libgfortranbegin.a)
+SHLIB := $(shell gfortran -m64 -print-file-name=libgfortran.dylib)
+SHLIB += $(shell gfortran -m64 -print-file-name=libgfortranbegin.a)
 SHLIB += -ldl
 endif