Tweak the warning message

1 files changed, 3 insertions, 3 deletions

diff --git a/cffi/cparser.py b/cffi/cparser.py
index c275f42..ea27c48 100644
--- a/cffi/cparser.py
+++ b/cffi/cparser.py
@@ -159,9 +159,9 @@ def _warn_for_string_literal(csource):
 def _warn_for_non_extern_non_static_global_variable(decl):
     if not decl.storage:
         import warnings
-        warnings.warn("Declaration of global variable '%s' in cdef() should "
-                      "be marked 'extern' for consistency (or possibly "
-                      "'static' in API mode)" % (decl.name,))
+        warnings.warn("Global variable '%s' in cdef(): for consistency "
+                      "with C it should have a storage class specifier "
+                      "(usually 'extern')" % (decl.name,))
 
 def _preprocess(csource):
     # Remove comments.  NOTE: this only work because the cdef() section