diff --git a/Makefile b/Makefile
index 97723a5..4bb5fe0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 CC=clang
-CFLAGS=-Wall -std=c99 -pedantic
+CFLAGS=-Wall -std=c99 -pedantic -Wextra
 
 OBJS = kk_ihex.o kk_ihex_write.o kk_ihex_read.o
 BINS = bin2ihex ihex2bin
diff --git a/bin2ihex.c b/bin2ihex.c
index 22a495c..a4be93e 100644
--- a/bin2ihex.c
+++ b/bin2ihex.c
@@ -31,6 +31,8 @@ main (void) {
     return EXIT_SUCCESS;
 }
 
+#pragma clang diagnostic ignored "-Wunused-parameter"
+
 void ihex_flush_buffer(struct ihex_state *ihex, char *buffer, char *eptr) {
     *eptr = '\0';
     (void) fputs(buffer, stdout);