diff --git a/README.md b/README.md
index 22172d5..72488e3 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@ dwl is not meant to provide every feature under the sun. Instead, like dwm, it s
 - Idle-inhibit protocol which lets applications such as mpv disable idle monitoring
 - Provide information to external status bars via stdout/stdin
 - Urgency hints via xdg-activate protocol
+- Support screen lockers via input-inhibitor protocol
 - Various Wayland protocols
 - XWayland support as provided by wlroots (can be enabled in `config.mk`)
 - Zero flickering - Wayland users naturally expect that "every frame is perfect"
@@ -26,7 +27,6 @@ dwl is not meant to provide every feature under the sun. Instead, like dwm, it s
 Features under consideration (possibly as patches) are:
 
 - Protocols made trivial by wlroots
-- Implement the input-inhibitor protocol to support screen lockers (see https://github.com/djpohly/dwl/pull/132)
 - Implement the text-input and input-method protocols to support IME once ibus implements input-method v2 (see https://github.com/ibus/ibus/pull/2256 and https://github.com/djpohly/dwl/pull/12)
 
 Feature *non-goals* for the main codebase include:
diff --git a/dwl.c b/dwl.c
index 01d165b..1bee09c 100644
--- a/dwl.c
+++ b/dwl.c
@@ -22,6 +22,7 @@
 #include <wlr/types/wlr_export_dmabuf_v1.h>
 #include <wlr/types/wlr_gamma_control_v1.h>
 #include <wlr/types/wlr_input_device.h>
+#include <wlr/types/wlr_input_inhibitor.h>
 #include <wlr/types/wlr_idle.h>
 #include <wlr/types/wlr_idle_inhibit_v1.h>
 #include <wlr/types/wlr_layer_shell_v1.h>
@@ -311,6 +312,7 @@ static struct wl_list clients; /* tiling order */
 static struct wl_list fstack;  /* focus order */
 static struct wlr_idle *idle;
 static struct wlr_idle_inhibit_manager_v1 *idle_inhibit_mgr;
+static struct wlr_input_inhibit_manager *input_inhibit_mgr;
 static struct wlr_layer_shell_v1 *layer_shell;
 static struct wlr_output_manager_v1 *output_mgr;
 static struct wlr_virtual_keyboard_manager_v1 *virtual_keyboard_mgr;
@@ -1309,8 +1311,10 @@ keypress(struct wl_listener *listener, void *data)
 
 	wlr_idle_notify_activity(idle, seat);
 
-	/* On _press_, attempt to process a compositor keybinding. */
-	if (event->state == WL_KEYBOARD_KEY_STATE_PRESSED)
+	/* On _press_ if there is no active screen locker,
+	 * attempt to process a compositor keybinding. */
+	if (!input_inhibit_mgr->active_inhibitor
+			&& event->state == WL_KEYBOARD_KEY_STATE_PRESSED)
 		for (i = 0; i < nsyms; i++)
 			handled = keybinding(mods, syms[i]) || handled;
 
@@ -1996,6 +2000,8 @@ setup(void)
 	xdg_shell = wlr_xdg_shell_create(dpy);
 	wl_signal_add(&xdg_shell->events.new_surface, &new_xdg_surface);
 
+	input_inhibit_mgr = wlr_input_inhibit_manager_create(dpy);
+
 	/* Use decoration protocols to negotiate server-side decorations */
 	wlr_server_decoration_manager_set_default_mode(
 			wlr_server_decoration_manager_create(dpy),