diff --git a/configure.ac b/configure.ac
index 356debf4..75d14e8b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -47,7 +47,6 @@ AH_BOTTOM([#endif /* SR_CONFIG_H */])
 CFLAGS="$CFLAGS -Wall -Wextra -fvisibility=hidden"
 
 # Checks for programs.
-AC_PROG_CXX
 AC_PROG_CC
 AC_PROG_CPP
 AC_PROG_INSTALL