diff --git a/testsuites/aclocal/prog-cxx.m4 b/testsuites/aclocal/prog-cxx.m4
index ccd10f208d..fdbb129bc3 100644
--- a/testsuites/aclocal/prog-cxx.m4
+++ b/testsuites/aclocal/prog-cxx.m4
@@ -24,7 +24,7 @@ AC_PROG_CXXCPP
     AC_MSG_ERROR([***]
      [Inconsistency in compiler configuration:]
      [Target C compiler and target C++ compiler]
-     [must both either be cross compilers or native compilers]
+     [must both either be cross compilers or native compilers])
   fi
 else
 ## Work-around to a bug in automake