diff --git a/bypy/linux/__main__.py b/bypy/linux/__main__.py
index e0b07b1055..5b008ecefa 100644
--- a/bypy/linux/__main__.py
+++ b/bypy/linux/__main__.py
@@ -43,7 +43,7 @@ def binary_includes():
             get_dll_path,
             ('usb-1.0 mtp expat sqlite3 ffi z lzma openjp2 poppler dbus-1 iconv xml2 xslt jpeg png16'
              ' webp webpmux webpdemux exslt ncursesw readline chm hunspell-1.7 hyphen'
-             ' icudata icui18n icuuc icuio gcrypt gpg-error'
+             ' icudata icui18n icuuc icuio stemmer gcrypt gpg-error'
              ' gobject-2.0 glib-2.0 gthread-2.0 gmodule-2.0 gio-2.0 dbus-glib-1').split()
         )) + [
             get_dll_path('podofo', 3), get_dll_path('bz2', 2), j(PREFIX, 'lib', 'libunrar.so'),
diff --git a/bypy/macos/__main__.py b/bypy/macos/__main__.py
index 74231e6a87..dfef724771 100644
--- a/bypy/macos/__main__.py
+++ b/bypy/macos/__main__.py
@@ -510,7 +510,7 @@ class Freeze(object):
         for x in (
             'usb-1.0.0', 'mtp.9', 'chm.0', 'sqlite3.0', 'hunspell-1.7.0',
             'icudata.67', 'icui18n.67', 'icuio.67', 'icuuc.67', 'hyphen.0',
-            'xslt.1', 'exslt.0', 'xml2.2', 'z.1', 'unrar', 'lzma.5',
+            'stemmer.0', 'xslt.1', 'exslt.0', 'xml2.2', 'z.1', 'unrar', 'lzma.5',
             'crypto.1.1', 'ssl.1.1', 'iconv.2',  # 'ltdl.7'
         ):
             print('\nAdding', x)
diff --git a/bypy/sources.json b/bypy/sources.json
index 21734a2b5e..9d5c8c8268 100644
--- a/bypy/sources.json
+++ b/bypy/sources.json
@@ -187,6 +187,15 @@
 
     },
 
+    {
+        "name": "libstemmer",
+        "unix": {
+            "filename": "libstemmer_c-2.1.0.tar.gz",
+            "hash": "sha256:8c148d3a27745981d29db4909681ec1bc922950b1ade45a01846edea2fb161e6",
+            "urls": ["https://snowballstem.org/dist/libstemmer_c-2.1.0.tar.gz"]
+        }
+    },
+
     {
         "name": "libjpeg",
         "unix": {