diff --git a/config.def.h b/config.def.h
index d5d4448..5acac6b 100644
--- a/config.def.h
+++ b/config.def.h
@@ -24,5 +24,5 @@ static const MimeType servermimes[] = {
 	{ "gz",   "application/x-gtar" },
 	{ "pdf",  "application/x-pdf" },
 	{ "tar",  "application/tar" },
-	{ "",     "application/octet-stream" }
+	{ "mp3",  "audio/mp3" }
 };
diff --git a/quark.c b/quark.c
index f0d32eb..db036b5 100644
--- a/quark.c
+++ b/quark.c
@@ -181,7 +181,7 @@ responsefiledata(int fd, off_t size) {
 
 void
 responsefile(void) {
-	const char *mimetype;
+	const char *mimetype = "application/octet-stream";
 	char *p;
 	char mod[25];
 	int i, ffd, r;
@@ -209,9 +209,7 @@ responsefile(void) {
 			if ((p = strrchr(reqbuf, '.'))) {
 				p++;
 				for (i = 0; i < LENGTH(servermimes); i++)
-					if (!strncmp(servermimes[i].extension, p,
-						     strlen(servermimes[i].extension)))
-					{
+					if (!strcmp(servermimes[i].extension, p)) {
 						mimetype = servermimes[i].mimetype;
 						break;
 					}