diff --git a/lib/dns/include/dns/db.h b/lib/dns/include/dns/db.h
index fd7e481d8e..6957bffe5b 100644
--- a/lib/dns/include/dns/db.h
+++ b/lib/dns/include/dns/db.h
@@ -58,6 +58,7 @@
 #include <isc/boolean.h>
 #include <isc/mem.h>
 #include <isc/lang.h>
+#include <isc/ondestroy.h>
 #include <isc/stdtime.h>
 
 #include <dns/types.h>
diff --git a/lib/isc/include/isc/mem.h b/lib/isc/include/isc/mem.h
index 125feb4a26..8bf83221aa 100644
--- a/lib/isc/include/isc/mem.h
+++ b/lib/isc/include/isc/mem.h
@@ -27,8 +27,6 @@
 #include <isc/result.h>
 #include <isc/types.h>
 
-#include <isc/ondestroy.h>
-
 ISC_LANG_BEGINDECLS
 
 typedef void * (*isc_memalloc_t)(void *, size_t);
diff --git a/lib/isc/mem.c b/lib/isc/mem.c
index 2e86842073..99d6f13459 100644
--- a/lib/isc/mem.c
+++ b/lib/isc/mem.c
@@ -27,6 +27,7 @@
 #include <isc/assertions.h>
 #include <isc/error.h>
 #include <isc/mem.h>
+#include <isc/ondestroy.h>
 
 #ifndef ISC_SINGLETHREADED
 #include <isc/mutex.h>