diff --git a/src/main/java/eu/siacs/conversations/services/ExportBackupService.java b/src/main/java/eu/siacs/conversations/services/ExportBackupService.java
index 16e1662cb..d715ea539 100644
--- a/src/main/java/eu/siacs/conversations/services/ExportBackupService.java
+++ b/src/main/java/eu/siacs/conversations/services/ExportBackupService.java
@@ -192,7 +192,7 @@ public class ExportBackupService extends Service {
             final String value = cursor.getString(i);
             if (value == null) {
                 builder.append("NULL");
-            } else if (value.matches("\\d+")) {
+            } else if (value.matches("[0-9]+")) {
                 builder.append(value);
             } else {
                 DatabaseUtils.appendEscapedSQLString(builder, value);
@@ -349,4 +349,4 @@ public class ExportBackupService extends Service {
             return builder.build();
         }
     }
-}
\ No newline at end of file
+}