diff --git a/configure.ac b/configure.ac
index 4a199e4..3191d8a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,7 +8,6 @@ AC_CONFIG_HEADERS([config.h])
 
 # Checks for programs.
 AC_PROG_CC
-AC_PROG_CXX
 AC_PROG_LIBTOOL
 
 # Checks for libraries.