diff --git a/tests/test_formdata.py b/tests/test_formdata.py
index f7b8ff181..b1a408de9 100644
--- a/tests/test_formdata.py
+++ b/tests/test_formdata.py
@@ -5328,10 +5328,15 @@ def test_fts_phone(pub):
     formdata.just_created()
     formdata.store()
 
-    assert formdef.data_class().count([FtsMatch('01 23 45 67 89')]) == 1
-    assert formdef.data_class().count([FtsMatch('0123456789')]) == 1
-    assert formdef.data_class().count([FtsMatch('+33123456789')]) == 1
-    assert formdef.data_class().count([FtsMatch('+33(0)123456789')]) == 1
+    formdata = formdef.data_class()()
+    formdata.data = {'1': None, '2': '0123456789'}
+    formdata.just_created()
+    formdata.store()
+
+    assert formdef.data_class().count([FtsMatch('01 23 45 67 89')]) == 2
+    assert formdef.data_class().count([FtsMatch('0123456789')]) == 2
+    assert formdef.data_class().count([FtsMatch('+33123456789')]) == 2
+    assert formdef.data_class().count([FtsMatch('+33(0)123456789')]) == 2
     assert formdef.data_class().count([FtsMatch('+33(0)123456789 foo')]) == 1
     assert formdef.data_class().count([FtsMatch('+33(0)123456789 bar')]) == 0
     assert formdef.data_class().count([FtsMatch('foo +33(0)123456789')]) == 1
diff --git a/wcs/sql.py b/wcs/sql.py
index addacd772..9a4c00dd8 100644
--- a/wcs/sql.py
+++ b/wcs/sql.py
@@ -2624,6 +2624,11 @@ class SqlDataMixin(SqlMixin):
                 if isinstance(value, str) and len(value) < 10000:
                     # avoid overlong strings, typically base64-encoded values
                     fts_strings[weight].add(value)
+                    # normalize values looking like phonenumbers, because
+                    # phonenumbers are normalized by the FTS criteria
+                    if len(value) < 30 and value != normalize_phone_number_for_fts_if_needed(value):
+                        # use weight 'D' to give preference to fields with the phonenumber validation
+                        fts_strings['D'].add(normalize_phone_number_for_fts_if_needed(value))
                 elif type(value) in (tuple, list):
                     for val in value:
                         fts_strings[weight].add(val)
diff --git a/wcs/sql_criterias.py b/wcs/sql_criterias.py
index a75f7500a..3333eb2c5 100644
--- a/wcs/sql_criterias.py
+++ b/wcs/sql_criterias.py
@@ -343,26 +343,33 @@ class ILike(Criteria):
         self.value = '%' + like_escape(self.value) + '%'
 
 
+phone_re = re.compile(
+    r'''.*?(?P<phone>         # a phone number
+        ((\+[1-9])|(\b0))     # starting with an international prefix, or 0
+        [-\(\)\d\.\s/]{6,20}  # then a bunch of numbers/symbols
+        \b)                   # till the end of the "word"''',
+    re.X,
+)
+
+
+def normalize_phone_number_for_fts_if_needed(value):
+    phone_match = phone_re.match(value)
+    if phone_match and not re.match(r'^\d+-\d+$', phone_match.group('phone').strip()):
+        # if it looks like a phone number, normalize it to its
+        # "international/E164" format to match what's stored in the
+        # database.
+        phone_value = misc.normalize_phone_number_for_fts(phone_match.group('phone').strip())
+        value = value.replace(phone_match.group('phone').strip(), phone_value)
+    return value
+
+
 class FtsMatch(Criteria):
     def __init__(self, value, extra_normalize=True, **kwargs):
         # make Criteria.__repr__ works
         self.attribute = 'fts'
         self.value = self.get_fts_value(value)
         if extra_normalize:
-            phone_match = re.match(
-                r'''.*?(?P<phone>         # a phone number
-                    ((\+[1-9])|(\b0))     # starting with an international prefix, or 0
-                    [-\(\)\d\.\s/]{6,20}  # then a bunch of numbers/symbols
-                    \b)                   # till the end of the "word"''',
-                self.value,
-                re.X,
-            )
-            if phone_match and not re.match(r'^\d+-\d+$', phone_match.group('phone').strip()):
-                # if it looks like a phone number, normalize it to its
-                # "international/E164" format to match what's stored in the
-                # database.
-                phone_value = misc.normalize_phone_number_for_fts(phone_match.group('phone').strip())
-                self.value = self.value.replace(phone_match.group('phone').strip(), phone_value)
+            self.value = normalize_phone_number_for_fts_if_needed(self.value)
 
     @classmethod
     def get_fts_value(cls, value):