diff --git a/samples/geos/Makefile b/samples/geos/Makefile
index e792c52f1..04de0aaa3 100644
--- a/samples/geos/Makefile
+++ b/samples/geos/Makefile
@@ -50,7 +50,7 @@ DIRLIST = grc
 
 define SUBDIR_recipe
 
-@$(MAKE) SYS=$(SYS) -C $(dir) --no-print-directory $@
+@+$(MAKE) SYS=$(SYS) -C $(dir) --no-print-directory $@
 
 endef # SUBDIR_recipe