diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4
index 0de7f3c..3b17b8f 100644
--- a/libltdl/m4/libtool.m4
+++ b/libltdl/m4/libtool.m4
@@ -7116,11 +7116,11 @@ solaris*)
     # The more standards-conforming stlport4 library is
     # incompatible with the Cstd library. Avoid specifying
     # it if it's in CXXFLAGS. Ignore libCrun as
     # -library=stlport4 depends on it.
     case " $CXX $CXXFLAGS " in
-    *" -library=stlport4 "*)
+    *" -library=stlport4 "*|*" -library=stdcxx4 "*)
       solaris_use_stlport4=yes
       ;;
     esac
 
     # Adding this requires a known-good setup of shared libraries for