diff --git a/obj/AParticleModifier.h b/obj/AParticleModifier.h
index 7336ec022bdffb03fe675fa3c533b58a83054a7a..19f63fd900c6509f5185c2bfee373374c0249f0e 100644
--- a/obj/AParticleModifier.h
+++ b/obj/AParticleModifier.h
@@ -4,6 +4,7 @@ All rights reserved.  Please see niflib.h for licence. */
 #ifndef _APARTICLEMODIFIER_H_
 #define _APARTICLEMODIFIER_H_
 
+#include "xml_extract.h"
 #include A_PARTICLE_MODIFIER_INCLUDE
 
 /*