--- geo/Makefile.in.orig	2023-05-25 10:21:18 UTC
+++ geo/Makefile.in
@@ -192,7 +192,8 @@ INCLUDES = \
 	-DDRGEO_GLADEDIR=\""$(gladedir)"\"		\
 	-DDRGEO_ENCODEDIR=\""$(encodedir)"\"		\
 	-I$(includedir) 				\
-	$(DRGEO_CFLAGS)				
+	$(DRGEO_CFLAGS)					\
+	$(GUILE_CFLAGS)
 
 
 noinst_LIBRARIES = libgeo.a
