diff --git a/include/extern.h b/include/extern.h
index ae6dab2ad..dcdffdbd5 100644
--- a/include/extern.h
+++ b/include/extern.h
@@ -1832,7 +1832,6 @@ extern boolean regex_compile(const char *, struct nhregex *);
 extern const char *regex_error_desc(struct nhregex *);
 extern boolean regex_match(const char *, struct nhregex *);
 extern void regex_free(struct nhregex *);
-extern void regex_at_exit(void);
 
 /* ### consoletty.c ### */
 
diff --git a/sys/share/cppregex.cpp b/sys/share/cppregex.cpp
index 4da1528c6..ca7d7978f 100644
--- a/sys/share/cppregex.cpp
+++ b/sys/share/cppregex.cpp
@@ -63,13 +63,3 @@ extern "C" {
     delete re;
   }
 }
-
-void
-regex_at_exit(void)
-{
-    if (cppregex_static_buffer != 0) {
-        free((genericptr_t) cppregex_static_buffer);
-        cppregex_static_buffer = (char *) 0;
-    }
-}
-
diff --git a/sys/share/pmatchregex.c b/sys/share/pmatchregex.c
index 289fb51fb..d04fdacc1 100644
--- a/sys/share/pmatchregex.c
+++ b/sys/share/pmatchregex.c
@@ -65,9 +65,3 @@ regex_free(struct nhregex *re)
         free((genericptr_t) re);
     }
 }
-
-void
-regex_at_exit(void)
-{
-}
-
diff --git a/sys/share/posixregex.c b/sys/share/posixregex.c
index 4000364ba..37f16ada9 100644
--- a/sys/share/posixregex.c
+++ b/sys/share/posixregex.c
@@ -104,9 +104,3 @@ regex_free(struct nhregex *re)
     regfree(&re->re);
     free(re);
 }
-
-void
-regex_at_exit(void)
-{
-}
-