diff --git a/src/atom.h b/src/atom.h
index f984e665..29374d94 100644
--- a/src/atom.h
+++ b/src/atom.h
@@ -23,6 +23,7 @@
 	WM_CLIENT_MACHINE, \
 	_NET_ACTIVE_WINDOW, \
 	_COMPTON_SHADOW, \
+	COMPTON_VERSION, \
 	_NET_WM_WINDOW_TYPE, \
 	_XROOTPMAP_ID, \
 	ESETROOT_PMAP_ID, \
diff --git a/src/picom.c b/src/picom.c
index c024dd4e..dc075c13 100644
--- a/src/picom.c
+++ b/src/picom.c
@@ -1327,11 +1327,10 @@ static int register_cm(session_t *ps) {
 	}
 
 	// Set COMPTON_VERSION
-	e = xcb_request_check(
-	    ps->c.c, xcb_change_property_checked(
-	                 ps->c.c, XCB_PROP_MODE_REPLACE, ps->reg_win,
-	                 get_atom(ps->atoms, "COMPTON_VERSION"), XCB_ATOM_STRING, 8,
-	                 (uint32_t)strlen(PICOM_VERSION), PICOM_VERSION));
+	e = xcb_request_check(ps->c.c, xcb_change_property_checked(
+	                                   ps->c.c, XCB_PROP_MODE_REPLACE, ps->reg_win,
+	                                   ps->atoms->aCOMPTON_VERSION, XCB_ATOM_STRING, 8,
+	                                   (uint32_t)strlen(PICOM_VERSION), PICOM_VERSION));
 	if (e) {
 		log_error_x_error(e, "Failed to set COMPTON_VERSION.");
 		free(e);