diff --git a/libraries/libapparmor/configure.ac b/libraries/libapparmor/configure.ac
index 479ba6ddc..73d99398b 100644
--- a/libraries/libapparmor/configure.ac
+++ b/libraries/libapparmor/configure.ac
@@ -81,7 +81,7 @@ AM_CONDITIONAL(HAVE_RUBY, test x$with_ruby = xyes)
 AC_HEADER_STDC
 AC_CHECK_HEADERS(unistd.h stdint.h syslog.h)
 
-AC_CHECK_FUNCS([asprintf __secure_getenv secure_getenv])
+AC_CHECK_FUNCS([asprintf __secure_getenv secure_getenv reallocarray])
 
 AM_PROG_CC_C_O
 AC_C_CONST
diff --git a/libraries/libapparmor/src/private.c b/libraries/libapparmor/src/private.c
index bece09d19..218f6628a 100644
--- a/libraries/libapparmor/src/private.c
+++ b/libraries/libapparmor/src/private.c
@@ -43,6 +43,17 @@
  #endif
 #endif
 
+/**
+ * Allow libapparmor to build on older glibcs and other libcs that do
+ * not support reallocarray.
+ */
+#ifndef HAVE_REALLOCARRY
+void *reallocarray(void *ptr, size_t nmemb, size_t size)
+{
+	return realloc(ptr, nmemb * size);
+}
+#endif
+
 struct ignored_suffix_t {
 	const char * text;
 	int len;