diff --git a/configure.ac b/configure.ac
index 5c7da197..e2b25288 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1702,6 +1702,9 @@ AC_LINK_IFELSE([AC_LANG_SOURCE(AC_INCLUDES_DEFAULT
 #ifndef _OPENBSD_SOURCE
 #define _OPENBSD_SOURCE 1
 #endif
+#ifdef __linux__
+# error reallocarray() is currently disabled on Linux to support glibc < 2.26
+#endif
 #include <stdlib.h>
 int main(void) {
 	void* p = reallocarray(NULL, 10, 100);