diff --git a/modules/youjizz/browser.py b/modules/youjizz/browser.py
index 456ec516..c159b1b1 100644
--- a/modules/youjizz/browser.py
+++ b/modules/youjizz/browser.py
@@ -19,6 +19,7 @@
 
 
 from weboob.browser import PagesBrowser, URL
+from weboob.capabilities.base import UserError
 
 from .pages.index import IndexPage
 from .pages.video import VideoPage
@@ -45,7 +46,7 @@ class YoujizzBrowser(PagesBrowser):
 
     def search_videos(self, pattern):
         if len(pattern) < 3:
-            raise ValueError('Pattern to short (min length : 3 characters)')
+            raise UserError('Pattern to short (min length : 3 characters)')
 
         self.search.go(pattern=pattern, pagenum=1)
         assert self.search.is_here(pattern=pattern, pagenum=1)
diff --git a/modules/youporn/browser.py b/modules/youporn/browser.py
index 08a75edf..bbfa8231 100644
--- a/modules/youporn/browser.py
+++ b/modules/youporn/browser.py
@@ -19,6 +19,7 @@
 
 
 from weboob.browser import PagesBrowser, URL
+from weboob.capabilities.base import UserError
 
 from .pages.index import IndexPage
 from .pages.video import VideoPage
@@ -41,7 +42,7 @@ class YoupornBrowser(PagesBrowser):
 
     def search_videos(self, pattern, sortby):
         if pattern == 'a' or pattern == 'i':
-            raise ValueError('this pattern is not supported');
+            raise UserError('this pattern is not supported');
 
         self.search.go(query=pattern)
         assert self.search.is_here()