diff --git a/wp-includes/js/wplink.js b/wp-includes/js/wplink.js
index 7c8c4984c5..954d211131 100644
--- a/wp-includes/js/wplink.js
+++ b/wp-includes/js/wplink.js
@@ -507,9 +507,10 @@
 
 		searchInternalLinks: function() {
 			var waiting,
-				search = inputs.search.val() || '';
+				search = inputs.search.val() || '',
+				minInputLength = parseInt( wpLinkL10n.minInputLength, 10 ) || 3;
 
-			if ( search.length > 2 ) {
+			if ( search.length >= minInputLength ) {
 				rivers.recent.hide();
 				rivers.search.show();
 
diff --git a/wp-includes/js/wplink.min.js b/wp-includes/js/wplink.min.js
index 136d44c8ac..5cd4e36521 100644
--- a/wp-includes/js/wplink.min.js
+++ b/wp-includes/js/wplink.min.js
@@ -1,2 +1,2 @@
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class="item-title"><em>'+h.noMatchesFound+"</em></span></li>"),this.ul[s?"html":"append"](n)},maybeLoad:function(){var n=this,i=this.element,e=i.scrollTop()+i.height();!this.query.ready()||e<this.contentHeight.height()-wpLink.riverBottomThreshold||setTimeout(function(){var e=i.scrollTop(),t=e+i.height();!n.query.ready()||t<n.contentHeight.height()-wpLink.riverBottomThreshold||(n.waiting.addClass("is-active"),i.scrollTop(e+n.waiting.outerHeight()),n.ajax(function(){n.waiting.removeClass("is-active")}))},wpLink.timeToTriggerRiver)}}),n=function(e){this.page=1,this.allLoaded=!1,this.querying=!1,this.search=e},c.extend(n.prototype,{ready:function(){return!(this.querying||this.allLoaded)},ajax:function(t){var 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\ No newline at end of file
+!function(c,h,u){var r,e,t,n,i,l=/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,63}$/i,o=/^(https?|ftp):\/\/[A-Z0-9.-]+\.[A-Z]{2,63}[^ "]*$/i,p={},a={},s="ontouchend"in document;function d(){return r?r.$('a[data-wplink-edit="true"]'):null}window.wpLink={timeToTriggerRiver:150,minRiverAJAXDuration:200,riverBottomThreshold:5,keySensitivity:100,lastSearch:"",textarea:"",modalOpen:!1,init:function(){p.wrap=c("#wp-link-wrap"),p.dialog=c("#wp-link"),p.backdrop=c("#wp-link-backdrop"),p.submit=c("#wp-link-submit"),p.close=c("#wp-link-close"),p.text=c("#wp-link-text"),p.url=c("#wp-link-url"),p.nonce=c("#_ajax_linking_nonce"),p.openInNewTab=c("#wp-link-target"),p.search=c("#wp-link-search"),a.search=new t(c("#search-results")),a.recent=new 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n=this;this.element=e,this.ul=e.children("ul"),this.contentHeight=e.children("#link-selector-height"),this.waiting=e.find(".river-waiting"),this.change(t),this.refresh(),c("#wp-link .query-results, #wp-link #link-selector").scroll(function(){n.maybeLoad()}),e.on("click","li",function(e){n.select(c(this),e)})},c.extend(t.prototype,{refresh:function(){this.deselect(),this.visible=this.element.is(":visible")},show:function(){this.visible||(this.deselect(),this.element.show(),this.visible=!0)},hide:function(){this.element.hide(),this.visible=!1},select:function(e,t){var n,i,a,s;e.hasClass("unselectable")||e==this.selected||(this.deselect(),this.selected=e.addClass("selected"),n=e.outerHeight(),i=this.element.height(),a=e.position().top,s=this.element.scrollTop(),a<0?this.element.scrollTop(s+a):i<a+n&&this.element.scrollTop(s+a-i+n),this.element.trigger("river-select",[e,t,this]))},deselect:function(){this.selected&&this.selected.removeClass("selected"),this.selected=!1},prev:function(){var e;this.visible&&this.selected&&(e=this.selected.prev("li")).length&&this.select(e)},next:function(){if(this.visible){var e=this.selected?this.selected.next("li"):c("li:not(.unselectable):first",this.element);e.length&&this.select(e)}},ajax:function(n){var i=this,e=1==this.query.page?0:wpLink.minRiverAJAXDuration,t=wpLink.delayedCallback(function(e,t){i.process(e,t),n&&n(e,t)},e);this.query.ajax(t)},change:function(e){this.query&&this._search==e||(this._search=e,this.query=new n(e),this.element.scrollTop(0))},process:function(e,t){var n="",i=!0,a="",s=1==t.page;e?c.each(e,function(){a=i?"alternate":"",a+=this.title?"":" no-title",n+=a?'<li class="'+a+'">':"<li>",n+='<input type="hidden" class="item-permalink" value="'+this.permalink+'" />',n+='<span class="item-title">',n+=this.title?this.title:h.noTitle,n+='</span><span class="item-info">'+this.info+"</span></li>",i=!i}):s&&(n+='<li class="unselectable no-matches-found"><span class="item-title"><em>'+h.noMatchesFound+"</em></span></li>"),this.ul[s?"html":"append"](n)},maybeLoad:function(){var n=this,i=this.element,e=i.scrollTop()+i.height();!this.query.ready()||e<this.contentHeight.height()-wpLink.riverBottomThreshold||setTimeout(function(){var e=i.scrollTop(),t=e+i.height();!n.query.ready()||t<n.contentHeight.height()-wpLink.riverBottomThreshold||(n.waiting.addClass("is-active"),i.scrollTop(e+n.waiting.outerHeight()),n.ajax(function(){n.waiting.removeClass("is-active")}))},wpLink.timeToTriggerRiver)}}),n=function(e){this.page=1,this.allLoaded=!1,this.querying=!1,this.search=e},c.extend(n.prototype,{ready:function(){return!(this.querying||this.allLoaded)},ajax:function(t){var n=this,i={action:"wp-link-ajax",page:this.page,_ajax_linking_nonce:p.nonce.val()};this.search&&(i.search=this.search),this.querying=!0,c.post(window.ajaxurl,i,function(e){n.page++,n.querying=!1,n.allLoaded=!e,t(e,i)},"json")}}),c(document).ready(wpLink.init)}(jQuery,window.wpLinkL10n,window.wp);
\ No newline at end of file
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 27e0c8e996..2dd48d5a66 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -1504,6 +1504,8 @@ function wp_default_scripts( &$scripts ) {
 			'noMatchesFound' => __( 'No results found.' ),
 			'linkSelected'   => __( 'Link selected.' ),
 			'linkInserted'   => __( 'Link inserted.' ),
+			/* translators: Minimum input length in characters to start searching posts in the "Insert/edit link" modal. */
+			'minInputLength' => (int) _x( '3', 'minimum input length for searching post links' ),
 		)
 	);
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index e1d255bf59..03325df1bc 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.4-alpha-46987';
+$wp_version = '5.4-alpha-46988';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.