diff --git a/libsrc/geos/system/get_ostype.s b/libsrc/geos/system/get_ostype.s
index 6124ca9db..ea6801e5c 100644
--- a/libsrc/geos/system/get_ostype.s
+++ b/libsrc/geos/system/get_ostype.s
@@ -11,6 +11,7 @@
 	    .export _get_tv
 	    .importzp tmp1
 
+	    .include "../inc/const.inc"
 	    .include "../inc/geossym.inc"
 	    .include "../inc/geossym2.inc"