diff --git a/configure.ac b/configure.ac
index 675e2184..ac5ac9fa 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,7 +13,6 @@ AC_CONFIG_HEADERS([config.h])
 
 # Checks for programs.
 AC_USE_SYSTEM_EXTENSIONS(_GNU_SOURCE)
-AC_PROG_CXX
 AC_PROG_AWK
 AC_PROG_CC
 AC_PROG_CC_STDC