diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/dialogs/ExportMessagesDialog.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/dialogs/ExportMessagesDialog.kt
index fbc451e4..86067596 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/dialogs/ExportMessagesDialog.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/dialogs/ExportMessagesDialog.kt
@@ -7,7 +7,7 @@ import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.smsmessenger.R
 import com.simplemobiletools.smsmessenger.activities.SimpleActivity
 import com.simplemobiletools.smsmessenger.extensions.config
-import com.simplemobiletools.smsmessenger.helpers.JSON_FILE_EXT
+import com.simplemobiletools.smsmessenger.helpers.JSON_FILE_EXTENSION
 import kotlinx.android.synthetic.main.dialog_export_messages.view.*
 import java.io.File
 
@@ -51,7 +51,7 @@ class ExportMessagesDialog(
                         when {
                             filename.isEmpty() -> activity.toast(R.string.empty_name)
                             filename.isAValidFilename() -> {
-                                val file = File(realPath, "$filename$JSON_FILE_EXT")
+                                val file = File(realPath, "$filename$JSON_FILE_EXTENSION")
                                 if (!hidePath && file.exists()) {
                                     activity.toast(R.string.name_taken)
                                     return@setOnClickListener
diff --git a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt
index 0b7415f2..3bade2ac 100644
--- a/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/smsmessenger/helpers/Constants.kt
@@ -28,7 +28,7 @@ const val PINNED_CONVERSATIONS = "pinned_conversations"
 const val BLOCKED_KEYWORDS = "blocked_keywords"
 const val EXPORT_SMS = "export_sms"
 const val EXPORT_MMS = "export_mms"
-const val JSON_FILE_EXT = ".json"
+const val JSON_FILE_EXTENSION = ".json"
 const val JSON_MIME_TYPE = "application/json"
 const val XML_MIME_TYPE = "text/xml"
 const val TXT_MIME_TYPE = "text/plain"