Patch would be:

diff --git a/Makefile b/Makefile
index 9ee453e..fd45e6b 100644
--- a/Makefile
+++ b/Makefile
@@ -58,6 +58,8 @@ CXXFLAGS += -fPIC
 
 # Common include files:
 
+CINCLUDES += -I$(INCDIR)
+
 ifdef DVBDIR
 CINCLUDES += -I$(DVBDIR)
 endif