diff --git a/components/crashcatcher/windows_crashmonitor.hpp b/components/crashcatcher/windows_crashmonitor.hpp
index 4028362836..eaf908bf66 100644
--- a/components/crashcatcher/windows_crashmonitor.hpp
+++ b/components/crashcatcher/windows_crashmonitor.hpp
@@ -6,6 +6,7 @@
 #include <Windows.h>
 
 #include <atomic>
+#include <unordered_map>
 
 namespace Crash
 {