diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index afbb23417411..26cad181b46b 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2001-12-07  Paolo Carlini  <pcarlini@unitus.it>
+
+	* include/bits/basic_string.tcc (_M_mutate): Fix typo
+	in the previous check in.
+
 2001-12-06  Paolo Carlini  <pcarlini@unitus.it>
 	    Loren J. Rittle <ljrittle@acm.org>
 
diff --git a/libstdc++-v3/include/bits/basic_string.tcc b/libstdc++-v3/include/bits/basic_string.tcc
index cbaf88361da1..808130496e75 100644
--- a/libstdc++-v3/include/bits/basic_string.tcc
+++ b/libstdc++-v3/include/bits/basic_string.tcc
@@ -290,9 +290,9 @@ namespace std
 	  const size_type __pagesize = 4096;
 	  const size_type __malloc_header_size = 4 * sizeof (void*);
 	  // The biggest string which fits in a memory page
-	  const size_type __page_capacity = !(__pagesize - __malloc_header_size
-					      - sizeof(_Rep) - sizeof(_CharT)) 
-	    				      / sizeof(_CharT);
+	  const size_type __page_capacity = (__pagesize - __malloc_header_size
+					     - sizeof(_Rep) - sizeof(_CharT)) 
+	    				     / sizeof(_CharT);
 	  _Rep* __r;
 	  if (__new_size > capacity() && __new_size > __page_capacity)
 	    // Growing exponentially.