diff --git a/lib/boinc_win.h b/lib/boinc_win.h
index 0676372e99..4c62ed5152 100644
--- a/lib/boinc_win.h
+++ b/lib/boinc_win.h
@@ -137,7 +137,7 @@ typedef size_t socklen_t;
 #include <stdint.h>
 #include <imagehlp.h>
 #else
-#include <security.h>
+#include <security.h>
 #include <dbghelp.h>
 #endif
 #include <tlhelp32.h>