diff --git a/configure.ac b/configure.ac
index baf47b7..c00a545 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,6 +17,7 @@ CFLAGS="$CFLAGS -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE
 AM_INIT_AUTOMAKE([-Wall -Wno-portability foreign subdir-objects tar-pax
                   parallel-tests])
 AM_PROG_CC_C_O
+AC_PROG_CPP
 m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 AC_DISABLE_STATIC
 AC_PROG_INSTALL