diff --git a/cgit.c b/cgit.c
index 2039ab1..4f414c3 100644
--- a/cgit.c
+++ b/cgit.c
@@ -17,6 +17,14 @@
 
 const char *cgit_version = CGIT_VERSION;
 
+void add_mimetype(const char *name, const char *value)
+{
+	struct string_list_item *item;
+
+	item = string_list_insert(xstrdup(name), &ctx.cfg.mimetypes);
+	item->util = xstrdup(value);
+}
+
 void config_cb(const char *name, const char *value)
 {
 	if (!strcmp(name, "root-title"))
@@ -101,6 +109,8 @@ void config_cb(const char *name, const char *value)
 		ctx.cfg.clone_prefix = xstrdup(value);
 	else if (!strcmp(name, "local-time"))
 		ctx.cfg.local_time = atoi(value);
+	else if (!prefixcmp(name, "mimetype."))
+		add_mimetype(name + 9, value);
 	else if (!strcmp(name, "repo.group"))
 		ctx.cfg.repo_group = xstrdup(value);
 	else if (!strcmp(name, "repo.url"))
@@ -213,6 +223,7 @@ static void prepare_context(struct cgit_context *ctx)
 	ctx->page.modified = time(NULL);
 	ctx->page.expires = ctx->page.modified;
 	ctx->page.etag = NULL;
+	memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
 }
 
 struct refmatch {
diff --git a/cgit.h b/cgit.h
index 8c64efe..9259f33 100644
--- a/cgit.h
+++ b/cgit.h
@@ -15,6 +15,7 @@
 #include <revision.h>
 #include <log-tree.h>
 #include <archive.h>
+#include <string-list.h>
 #include <xdiff-interface.h>
 #include <xdiff/xdiff.h>
 #include <utf8.h>
@@ -174,6 +175,7 @@ struct cgit_config {
 	int summary_branches;
 	int summary_log;
 	int summary_tags;
+	struct string_list mimetypes;
 };
 
 struct cgit_page {
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index a207fe0..7256ec0 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -147,6 +147,10 @@ max-stats::
 	"month", "quarter" and "year". If unspecified, statistics are
 	disabled. Default value: none. See also: "repo.max-stats".
 
+mimetype.<ext>::
+	Set the mimetype for the specified filename extension. This is used
+	by the `plain` command when returning blob content.
+
 module-link::
 	Text which will be used as the formatstring for a hyperlink when a
 	submodule is printed in a directory listing. The arguments for the
@@ -324,6 +328,19 @@ root-readme=/var/www/htdocs/about.html
 snapshots=tar.gz tar.bz2 zip
 
 
+##
+## List of common mimetypes
+##
+
+mimetype.git=image/git
+mimetype.html=text/html
+mimetype.jpg=image/jpeg
+mimetype.jpeg=image/jpeg
+mimetype.pdf=application/pdf
+mimetype.png=image/png
+mimetype.svg=image/svg+xml
+
+
 ##
 ## List of repositories.
 ## PS: Any repositories listed when repo.group is unset will not be
diff --git a/ui-plain.c b/ui-plain.c
index 93a3a05..27c6dae 100644
--- a/ui-plain.c
+++ b/ui-plain.c
@@ -17,8 +17,9 @@ int match;
 static void print_object(const unsigned char *sha1, const char *path)
 {
 	enum object_type type;
-	char *buf;
+	char *buf, *ext;
 	unsigned long size;
+	struct string_list_item *mime;
 
 	type = sha1_object_info(sha1, &size);
 	if (type == OBJ_BAD) {
@@ -31,10 +32,19 @@ static void print_object(const unsigned char *sha1, const char *path)
 		html_status(404, "Not found", 0);
 		return;
 	}
-	if (buffer_is_binary(buf, size))
-		ctx.page.mimetype = "application/octet-stream";
-	else
-		ctx.page.mimetype = "text/plain";
+	ctx.page.mimetype = NULL;
+	ext = strrchr(path, '.');
+	if (ext && *(++ext)) {
+		mime = string_list_lookup(ext, &ctx.cfg.mimetypes);
+		if (mime)
+			ctx.page.mimetype = (char *)mime->util;
+	}
+	if (!ctx.page.mimetype) {
+		if (buffer_is_binary(buf, size))
+			ctx.page.mimetype = "application/octet-stream";
+		else
+			ctx.page.mimetype = "text/plain";
+	}
 	ctx.page.filename = fmt("%s", path);
 	ctx.page.size = size;
 	ctx.page.etag = sha1_to_hex(sha1);