diff --git a/src/include/ngspice/cpextern.h b/src/include/ngspice/cpextern.h
index 9fa01e23e..8d18caf34 100644
--- a/src/include/ngspice/cpextern.h
+++ b/src/include/ngspice/cpextern.h
@@ -79,7 +79,6 @@ extern void cp_pushcontrol(void);
 
 /* glob.c */
 
-extern bool cp_globmatch(const char *p, const char *s);
 extern char *cp_tildexpand(const char *string);
 extern char cp_cbrac;
 extern char cp_ccurl;