diff --git a/sphinx/domains/c.py b/sphinx/domains/c.py
index f9f2e6647..aed5b47e5 100644
--- a/sphinx/domains/c.py
+++ b/sphinx/domains/c.py
@@ -59,7 +59,12 @@ class CObject(ObjectDescription):
 
     # These C types aren't described anywhere, so don't try to create
     # a cross-reference to them
-    stopwords = set(('const', 'void', 'char', 'int', 'long', 'FILE', 'struct'))
+    stopwords = set((
+        'const', 'void', 'char', 'wchar_t', 'int', 'short',
+        'long', 'float', 'double', 'unsigned', 'signed', 'FILE',
+        'clock_t', 'time_t', 'ptrdiff_t', 'size_t', 'ssize_t',
+        'struct', '_Bool',
+    ))
 
     def _parse_type(self, node, ctype):
         # add cross-ref nodes for all words