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-rw-r--r--gr-howto-write-a-block/Makefile.common3
1 files changed, 2 insertions, 1 deletions
diff --git a/gr-howto-write-a-block/Makefile.common b/gr-howto-write-a-block/Makefile.common
index fca6133c14..2b9cc75afc 100644
--- a/gr-howto-write-a-block/Makefile.common
+++ b/gr-howto-write-a-block/Makefile.common
@@ -56,7 +56,8 @@ STD_DEFINES_AND_INCLUDES = \
$(DEFINES) \
-I$(abs_top_srcdir)/lib \
-I$(GNURADIO_CORE_INCLUDEDIR) \
- -I$(GNURADIO_CORE_INCLUDEDIR)/swig
+ -I$(GNURADIO_CORE_INCLUDEDIR)/swig \
+ -I$(GRUEL_INCLUDEDIR)/gruel/swig
# includes
modincludedir = $(includedir)/$(modname)