diff --git a/lldb/include/lldb/Symbol/CompilerDeclContext.h b/lldb/include/lldb/Symbol/CompilerDeclContext.h
index 70399b2dbb37..d696bb8ebec2 100644
--- a/lldb/include/lldb/Symbol/CompilerDeclContext.h
+++ b/lldb/include/lldb/Symbol/CompilerDeclContext.h
@@ -14,6 +14,7 @@
 
 #include "lldb/lldb-private.h"
 #include "lldb/Core/ConstString.h"
+#include <vector>
 
 namespace lldb_private {