diff --git a/README.md b/README.md
index 424caf2..7e1fb8d 100644
--- a/README.md
+++ b/README.md
@@ -34,8 +34,6 @@ small previews is displayed, making it easy to choose an image to open.
 
 sxiv supports the following command-line options:
 
-    -a           Display all given files, do not filter out unsupported files
-                 (shorter startup time for long file list or slow file types)
     -C           Remove all orphaned cache files from thumbnail cache and exit
     -d           Scale all images to 100%, but fit large images into window
     -F           Use size-hints to make the window fixed/floating
diff --git a/options.c b/options.c
index 8105485..5e0bce7 100644
--- a/options.c
+++ b/options.c
@@ -31,7 +31,7 @@ options_t _options;
 const options_t *options = (const options_t*) &_options;
 
 void print_usage() {
-	printf("usage: sxiv [-aCdFfhpqrstvZ] [-g GEOMETRY] [-z ZOOM] FILES...\n");
+	printf("usage: sxiv [-CdFfhpqrstvZ] [-g GEOMETRY] [-z ZOOM] FILES...\n");
 }
 
 void print_version() {
@@ -51,19 +51,15 @@ void parse_options(int argc, char **argv) {
 	_options.fullscreen = 0;
 	_options.geometry = NULL;
 
-	_options.all = 0;
 	_options.quiet = 0;
 	_options.clean_cache = 0;
 	_options.recursive = 0;
 
-	while ((opt = getopt(argc, argv, "aCdFfg:hpqrstvZz:")) != -1) {
+	while ((opt = getopt(argc, argv, "CdFfg:hpqrstvZz:")) != -1) {
 		switch (opt) {
 			case '?':
 				print_usage();
 				exit(1);
-			case 'a':
-				_options.all = 1;
-				break;
 			case 'C':
 				_options.clean_cache = 1;
 				break;
diff --git a/options.h b/options.h
index b7b8ba5..f465855 100644
--- a/options.h
+++ b/options.h
@@ -35,7 +35,6 @@ typedef struct {
 	unsigned char fullscreen;
 	char *geometry;
 
-	unsigned char all;
 	unsigned char quiet;
 	unsigned char clean_cache;
 	unsigned char recursive;
diff --git a/sxiv.1 b/sxiv.1
index e7f19e2..18877de 100644
--- a/sxiv.1
+++ b/sxiv.1
@@ -3,7 +3,7 @@
 sxiv \- Simple (or small or suckless) X Image Viewer
 .SH SYNOPSIS
 .B sxiv
-.RB [ \-aCdFfhpqrstvZ ]
+.RB [ \-CdFfhpqrstvZ ]
 .RB [ \-g
 .IR GEOMETRY ]
 .RB [ \-z
@@ -31,11 +31,6 @@ Please note, that the fullscreen mode requires an EWMH/NetWM compliant window
 manager.
 .SH OPTIONS
 .TP
-.B \-a
-Display all given files, do not filter out unsupported files. This might result
-in a much shorter startup time, when the file list is very long or contains
-large files of slow loadable types, e.g. gif and progressive jpg.
-.TP
 .B \-C
 Remove all orphaned cache files from the thumbnail cache directory and exit.
 .TP