diff --git a/apps/documenteditor/mobile/app/controller/Search.js b/apps/documenteditor/mobile/app/controller/Search.js
index aa653f314..37b8a1484 100644
--- a/apps/documenteditor/mobile/app/controller/Search.js
+++ b/apps/documenteditor/mobile/app/controller/Search.js
@@ -306,7 +306,7 @@ define([
                     matchword = Common.SharedSettings.get('search-highlight') || false;
 
                 if (search && search.length) {
-                    if (!this.api.asc_replaceText(search, replace, false, matchcase, matchword)) {
+                    if (!this.api.asc_replaceText(search, replace || '', false, matchcase, matchword)) {
                         var me = this;
                         uiApp.alert(
                             '',
@@ -324,7 +324,7 @@ define([
                     matchword = Common.SharedSettings.get('search-highlight') || false;
 
                 if (search && search.length) {
-                    this.api.asc_replaceText(search, replace, true, matchcase, matchword);
+                    this.api.asc_replaceText(search, replace || '', true, matchcase, matchword);
                 }
             },
 
diff --git a/apps/presentationeditor/mobile/app/controller/Search.js b/apps/presentationeditor/mobile/app/controller/Search.js
index 95d74a3d2..fbc1847b2 100644
--- a/apps/presentationeditor/mobile/app/controller/Search.js
+++ b/apps/presentationeditor/mobile/app/controller/Search.js
@@ -294,7 +294,7 @@ define([
                 var matchcase = Common.SharedSettings.get('search-case-sensitive') || false;
 
                 if (search && search.length) {
-                    if (!this.api.asc_replaceText(search, replace, false, matchcase)) {
+                    if (!this.api.asc_replaceText(search, replace || '', false, matchcase)) {
                         var me = this;
                         uiApp.alert(
                             '',
@@ -311,7 +311,7 @@ define([
                 var matchcase = Common.SharedSettings.get('search-case-sensitive') || false;
 
                 if (search && search.length) {
-                    this.api.asc_replaceText(search, replace, true, matchcase);
+                    this.api.asc_replaceText(search, replace || '', true, matchcase);
                 }
             },
 
diff --git a/apps/spreadsheeteditor/mobile/app/controller/Search.js b/apps/spreadsheeteditor/mobile/app/controller/Search.js
index a7253b3ac..7bc278328 100644
--- a/apps/spreadsheeteditor/mobile/app/controller/Search.js
+++ b/apps/spreadsheeteditor/mobile/app/controller/Search.js
@@ -345,7 +345,7 @@ define([
 
                     var options = new Asc.asc_CFindOptions();
                     options.asc_setFindWhat(search);
-                    options.asc_setReplaceWith(replace);
+                    options.asc_setReplaceWith(replace || '');
                     options.asc_setIsMatchCase(matchCase);
                     options.asc_setIsWholeCell(matchCell);
                     options.asc_setScanOnOnlySheet(lookInSheet);
@@ -369,7 +369,7 @@ define([
 
                     var options = new Asc.asc_CFindOptions();
                     options.asc_setFindWhat(search);
-                    options.asc_setReplaceWith(replace);
+                    options.asc_setReplaceWith(replace || '');
                     options.asc_setIsMatchCase(matchCase);
                     options.asc_setIsWholeCell(matchCell);
                     options.asc_setScanOnOnlySheet(lookInSheet);