diff --git a/engine/external/jar/jar_xm.h b/engine/external/jar/jar_xm.h
index 223f3ef..c0d5d3a 100644
--- a/engine/external/jar/jar_xm.h
+++ b/engine/external/jar/jar_xm.h
@@ -1381,7 +1381,7 @@ static void jar_xm_volume_slide(jar_xm_channel_context_t* ch, gf_uint8_t rawval)
 	}
 }
 
-static float jar_xm_envelope_lerp(jar_xm_envelope_point_t* restrict a, jar_xm_envelope_point_t* restrict b, gf_uint16_t pos) {
+static float jar_xm_envelope_lerp(jar_xm_envelope_point_t* a, jar_xm_envelope_point_t* b, gf_uint16_t pos) {
 	/* Linear interpolation between two envelope points */
 	if(pos <= a->frame) return a->value;
 	else if(pos >= b->frame)