diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 7abf1b1ccc1..0213c3c6bc4 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -73039,7 +73039,7 @@ done
   CXXFLAGS="$ac_save_CXXFLAGS"
 
     ;;
-  *-vxworks)
+  *-vxworks*)
     $as_echo "#define HAVE_ACOSF 1" >>confdefs.h
 
     $as_echo "#define HAVE_ASINF 1" >>confdefs.h
diff --git a/libstdc++-v3/configure.host b/libstdc++-v3/configure.host
index 8d1b60804f3..ec32980aa0d 100644
--- a/libstdc++-v3/configure.host
+++ b/libstdc++-v3/configure.host
@@ -303,7 +303,7 @@ case "${host_os}" in
   tpf)
     os_include_dir="os/tpf"
     ;;
-  vxworks)
+  vxworks*)
     os_include_dir="os/vxworks"
     ;;
   *)
diff --git a/libstdc++-v3/crossconfig.m4 b/libstdc++-v3/crossconfig.m4
index 9f2589b739e..ff44d5ae019 100644
--- a/libstdc++-v3/crossconfig.m4
+++ b/libstdc++-v3/crossconfig.m4
@@ -276,7 +276,7 @@ case "${host}" in
     GLIBCXX_CHECK_MATH_SUPPORT
     GLIBCXX_CHECK_STDLIB_SUPPORT
     ;;
-  *-vxworks)
+  *-vxworks*)
     AC_DEFINE(HAVE_ACOSF)
     AC_DEFINE(HAVE_ASINF)
     AC_DEFINE(HAVE_ATAN2F)