diff --git a/libpkgconf/config.h.meson b/libpkgconf/config.h.meson
index 09279da..74af731 100644
--- a/libpkgconf/config.h.meson
+++ b/libpkgconf/config.h.meson
@@ -9,6 +9,9 @@
 /* Define to 1 if you have the `strndup' function. */
 #mesondefine HAVE_STRNDUP
 
+/* Define to 1 if you have the `reallocarray' function. */
+#mesondefine HAVE_REALLOCARRAY
+
 /* Name of package */
 #mesondefine PACKAGE
 
diff --git a/meson.build b/meson.build
index 115918e..724ac27 100644
--- a/meson.build
+++ b/meson.build
@@ -16,6 +16,7 @@ check_functions = [
   ['HAVE_STRDUP', 'strdup', 'string.h'],
   ['HAVE_STRNCASECMP', 'strncasecmp', 'strings.h'],
   ['HAVE_STRCASECMP', 'strcasecmp', 'strings.h'],
+  ['HAVE_REALLOCARRAY', 'reallocarray', 'stdlib.h'],
 ]
 
 foreach f : check_functions