diff --git a/configure.ac b/configure.ac
index 505035cb..d6394639 100644
--- a/configure.ac
+++ b/configure.ac
@@ -184,7 +184,7 @@ AM_COND_IF([PROXY_CLIENT_OR_SERVER], [
     # llhttp has no pkgconfig, instead we check with:
     AC_CHECK_LIB(llhttp, exit,, AC_MSG_ERROR([Missing llhttp library files]))
     AC_CHECK_HEADERS([llhttp.h], [llhttp_headers=yes; break;])
-    AC_SUBST(http_lib, ["-lllhttp"])
+    AC_SUBST(llhttp_lib, [", liblllhttp"])
     AS_IF([test "x$llhttp_headers" != "xyes"], AC_MSG_ERROR([Missing llhttp headers files]))
 ])