diff --git a/libs/xmlrpc-c/configure.in b/libs/xmlrpc-c/configure.in
index 6f363a0ae3..d88ef8f2d6 100644
--- a/libs/xmlrpc-c/configure.in
+++ b/libs/xmlrpc-c/configure.in
@@ -240,9 +240,7 @@ dnl Checks for programs.
 dnl =======================================================================
 
 AC_PROG_CC
-if test x"$enable_cplusplus" != xno; then
-    AC_PROG_CXX
-fi
+AC_PROG_CXX
 AC_PROG_INSTALL