diff --git a/configure.ac b/configure.ac
index 9bd1841..ace06b4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -14,5 +14,7 @@
 
 AC_CHECK_FUNCS(splice)
 
+PKG_CHECK_MODULES(JSON, [json-c])
+
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT