1 files changed, 2 insertions, 0 deletions
diff --git a/common.mk b/common.mk
index 93eb2925c4..90208344ac 100644
--- a/common.mk
+++ b/common.mk
@@ -18,6 +18,8 @@ RUBYLIB       = $(PATH_SEPARATOR)
 RUBYOPT       = -
 RUN_OPTS      = --disable-gems
 
+INCFLAGS = -I. -I$(arch_hdrdir) -I$(hdrdir) -I$(srcdir)
+
 GEM_HOME =
 GEM_PATH =
 GEM_VENDOR =