diff --git a/lib/isc/include/isc/strerr.h b/lib/isc/include/isc/strerr.h
index 1d16819769..f8bad238cc 100644
--- a/lib/isc/include/isc/strerr.h
+++ b/lib/isc/include/isc/strerr.h
@@ -13,7 +13,7 @@
 
 /*! \file isc/strerr.h */
 
-#include <string.h>
+#include <isc/string.h>
 
 #if defined(strerror_r)
 #undef strerror_r