Readseq/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Readseq/Makefile b/Readseq/Makefile
index f073aaa..05f2edd 100644
--- a/Readseq/Makefile
+++ b/Readseq/Makefile
@@ -6,11 +6,11 @@
 #
 
 # pick an ANSI C compiler (the default Sun CC is not ANSI)
-CC=gcc  # Gnu C Compiler
+CC?=gcc  # Gnu C Compiler
 #CC=cc  # SGI Irix
 #CC=vcc # some DEC Ultrix
 
-CFLAGS=
+CFLAGS?=
 #CFLAGS= -DSMALLCHECKSUM  # if you prefer to use a GCG-standard 13 bit checksum
 #    instead of a full 32 bit checksum. This may enhance compatibility w/ GCG software
 
@@ -40,7 +40,7 @@ all: build test
 
 build: $(SOURCES)
 	@echo "Compiling readseq..."
-	$(CC) $(LDFLAGS) $(CFLAGS) -o readseq readseq.c ureadseq.c
+	$(CC) $(LDFLAGS) $(CFLAGS) -o readseq readseq.c ureadseq.c ureadasn.c
 
 # if using NCBI, uncomment these lines in place of build: above
 #build: $(SOURCES)