diff --git a/indra/llcommon/ndcallstack.h b/indra/llcommon/ndcallstack.h
index 0c8c41706a..db48d295fd 100644
--- a/indra/llcommon/ndcallstack.h
+++ b/indra/llcommon/ndcallstack.h
@@ -26,6 +26,7 @@
  */
 
 #include "ndstackwalk.h"
+#include <string.h>
 
 namespace nd
 {
diff --git a/indra/llcommon/ndmallocstats.cpp b/indra/llcommon/ndmallocstats.cpp
index 2a6bc645f1..b8e5f582f3 100644
--- a/indra/llcommon/ndmallocstats.cpp
+++ b/indra/llcommon/ndmallocstats.cpp
@@ -27,6 +27,7 @@
 #include "ndintrin.h"
 
 #include <iomanip>
+#include <string.h>
 
 namespace ndMallocStats
 {