diff --git a/lrzip.c b/lrzip.c
index 7e32e10..a77eba6 100644
--- a/lrzip.c
+++ b/lrzip.c
@@ -1359,7 +1359,7 @@ bool initialise_control(rzip_control *control)
 	control->msgerr = stderr;
 	register_outputfile(control, control->msgout);
 	control->flags = FLAG_SHOW_PROGRESS | FLAG_KEEP_FILES | FLAG_THRESHOLD;
-	control->suffix = strdup(".lrz");
+	control->suffix = ".lrz";
 	control->compression_level = 7;
 	control->ramsize = get_ram(control);
 	if (unlikely(control->ramsize == -1))
diff --git a/main.c b/main.c
index a282ebe..f1c3ba1 100644
--- a/main.c
+++ b/main.c
@@ -461,8 +461,7 @@ int main(int argc, char *argv[])
 			if (unlikely(STDOUT))
 				failure("Cannot specify an output filename when outputting to stdout\n");
 			control->outname = optarg;
-			dealloc(control->suffix);
-			control->suffix = strdup("");
+			control->suffix = "";
 			break;
 		case 'O':
 			if (control->outname)	/* can't mix -o and -O */
@@ -497,8 +496,7 @@ int main(int argc, char *argv[])
 				failure("Specified output filename already, can't specify an extension.\n");
 			if (unlikely(STDOUT))
 				failure("Cannot specify a filename suffix when outputting to stdout\n");
-			dealloc(control->suffix);
-			control->suffix = strdup(optarg);
+			control->suffix = optarg;
 			break;
 		case 't':
 			if (control->outname)