diff --git a/m4/libtool.m4 b/m4/libtool.m4
index c75ad3c5..0a9c9afa 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -4782,7 +4782,7 @@ m4_if([$1], [CXX], [
 	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-KPIC'
 	_LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
         ;;
-      *flang* | ftn)
+      *flang* | ftn | f18* | f95*)
         # Flang compiler.
 	_LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
 	_LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'