map: allow creating mappings with no modifiers

 doc/riverctl.1        | 3 +++
 river/command/map.zig | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/doc/riverctl.1 b/doc/riverctl.1
index 530c8c9..4b8e49d 100644
--- a/doc/riverctl.1
+++ b/doc/riverctl.1
@@ -156,6 +156,9 @@ for a list of special key names.
 .I command
 can be any of the above commands.
 
+A mapping without modifiers can be created by passing an empty string as the
+modifiers argument.
+
 .SH EXAMPLES
 
 Bind bemenu-run to Super+P:
diff --git a/river/command/map.zig b/river/command/map.zig
index 3837a6f..991e651 100644
--- a/river/command/map.zig
+++ b/river/command/map.zig
@@ -27,6 +27,7 @@ const modifier_names = [_]struct {
     name: []const u8,
     modifier: u32,
 }{
+    .{ .name = "", .modifier = 0 },
     .{ .name = "Shift", .modifier = c.WLR_MODIFIER_SHIFT },
     .{ .name = "Lock", .modifier = c.WLR_MODIFIER_CAPS },
     .{ .name = "Control", .modifier = c.WLR_MODIFIER_CTRL },
@@ -40,7 +41,7 @@ const modifier_names = [_]struct {
 /// Create a new mapping for a given mode
 ///
 /// Example:
-/// map normal Mod4|Shift Return spawn alacritty
+/// map normal Mod4+Shift Return spawn alacritty
 pub fn map(
     allocator: *std.mem.Allocator,
     seat: *Seat,