diff --git a/src/libstrongswan/utils/compat/windows.h b/src/libstrongswan/utils/compat/windows.h
index fd4f1f196..f7e6207a5 100644
--- a/src/libstrongswan/utils/compat/windows.h
+++ b/src/libstrongswan/utils/compat/windows.h
@@ -220,6 +220,11 @@ static inline int setenv(const char *name, const char *value, int overwrite)
  */
 #define RTLD_LAZY 1
 
+/**
+ * Immediate binding, ignored on Windows
+ */
+#define RTLD_NOW 2
+
 /**
  * Default handle targeting .exe
  */