diff --git a/examples/sample.source.PKIX1/Makefile b/examples/sample.source.PKIX1/Makefile
index a69669d..dfa06f8 100644
--- a/examples/sample.source.PKIX1/Makefile
+++ b/examples/sample.source.PKIX1/Makefile
@@ -358,7 +358,7 @@
 	make
 
 $(TARGET).o: ../decoder-template.c
-	$(CC) $(CFLAGS) -Dasn_DEF=asn_DEF_Certificate -o $(TARGET).o -c ../decoder-template.c
+	$(CC) $(CFLAGS) -o $(TARGET).o -c ../decoder-template.c
 
 distclean: clean
 	rm -f $(ASN_MODULE_SOURCES) $(ASN_MODULE_HEADERS)
diff --git a/examples/sample.source.PKIX1/config.h b/examples/sample.source.PKIX1/config.h
index 63b2105..5385d42 100644
--- a/examples/sample.source.PKIX1/config.h
+++ b/examples/sample.source.PKIX1/config.h
@@ -7,3 +7,5 @@
 		fprintf(stderr, " (%s:%d)\n",	\
 			__FILE__, __LINE__);	\
 	} while(0)
+
+#define	asn_DEF	asn_DEF_Certificate	/* for ../decoder-template.c */