diff --git a/util/pgtblgen/pgtblgen.c b/util/pgtblgen/pgtblgen.c
index efbad55204..e9ebd8b0cf 100644
--- a/util/pgtblgen/pgtblgen.c
+++ b/util/pgtblgen/pgtblgen.c
@@ -28,7 +28,7 @@ static void usage(char *argv[])
 	printf("usage: %s -b <addr> -a <arch> -o <file>\n", argv[0]);
 	printf("  -a\t architecure. Supported: x86_64\n");
 	printf("  -b\t base address\n");
-	printf("  -b\t the file to write to\n");
+	printf("  -o\t the file to write to\n");
 	printf("  -h\t show this help text\n");
 }