diff --git a/config.h.meson b/config.h.meson
index ee3292ec8c..ef72e766fc 100644
--- a/config.h.meson
+++ b/config.h.meson
@@ -299,6 +299,9 @@
 /* Define to 1 if you have the <pthread.h> header file. */
 #mesondefine HAVE_PTHREAD_H
 
+/* Define to 1 if you have the `qsort_r' function. */
+#mesondefine HAVE_QSORT_R
+
 /* Define to 1 if you have the `readv' function. */
 #mesondefine HAVE_READV