diff --git a/examples/sample.source.LDAP3/Makefile b/examples/sample.source.LDAP3/Makefile
index c563356..21ee000 100644
--- a/examples/sample.source.LDAP3/Makefile
+++ b/examples/sample.source.LDAP3/Makefile
@@ -146,6 +146,12 @@
 ASN_MODULE_SOURCES+=xer_decoder.c
 ASN_MODULE_HEADERS+=xer_encoder.h
 ASN_MODULE_SOURCES+=xer_encoder.c
+ASN_MODULE_HEADERS+=oer_decoder.h
+ASN_MODULE_SOURCES+=oer_decoder.c
+ASN_MODULE_HEADERS+=oer_encoder.h
+ASN_MODULE_SOURCES+=oer_encoder.c
+ASN_MODULE_HEADERS+=oer_support.h
+ASN_MODULE_SOURCES+=oer_support.c
 ASN_MODULE_HEADERS+=per_support.h
 ASN_MODULE_SOURCES+=per_support.c
 ASN_MODULE_HEADERS+=per_decoder.h
@@ -163,19 +169,19 @@
 # This file may be used as an input for make(3)
 # Remove the lines below to convert it into a pure .am file
 TARGET = ldap3dump
-CFLAGS += -DASN_CONVERTER_TITLE="Lightweight Directory Access Protocol V3 decoder" -DHAVE_CONFIG_H -DJUNKTEST -D_DEFAULT_SOURCE  -DPDU=LDAPMessage -I.
+CPPFLAGS += -DASN_CONVERTER_TITLE="Lightweight Directory Access Protocol V3 decoder" -DHAVE_CONFIG_H -DJUNKTEST -D_DEFAULT_SOURCE  -DASN_DISABLE_OER_SUPPORT -DASN_DISABLE_PER_SUPPORT -DPDU=LDAPMessage -I.
 OBJS=${ASN_MODULE_SOURCES:.c=.o} ${ASN_CONVERTER_SOURCES:.c=.o}
 
 all: LDAPMessage.c $(TARGET)
 
 $(TARGET): ${OBJS}
-	$(CC) $(CFLAGS) -o $(TARGET) ${OBJS} $(LDFLAGS) $(LIBS)
+	$(CC) $(CPPFLAGS) -o $(TARGET) ${OBJS} $(LDFLAGS) $(LIBS)
 
 .SUFFIXES:
 .SUFFIXES: .c .o
 
 .c.o:
-	$(CC) $(CFLAGS) -o $@ -c $<
+	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ -c $<
 
 clean:
 	rm -f $(TARGET)
@@ -198,7 +204,7 @@
 	ASN1MODULES="../rfc4511-Lightweight-Directory-Access-Protocol-V3.asn1" \
 	ASN1PDU=LDAPMessage \
 	PROGNAME=ldap3dump \
-	CFLAGS="" \
+	CPPFLAGS="" \
 	../sample.makefile.regen
 
 check: ${TARGET} check-ber check-xer check-per