diff --git a/ChangeLog b/ChangeLog
index d5bf54f41..14145818d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2010-10-15  Robert Larice
+ * src/xspice/cmpp/ifs_lex.l ,
+ * src/xspice/cmpp/ifs_yacc.y ,
+ * src/xspice/cmpp/ifs_yacc_y.h ,
+ * src/xspice/cmpp/read_ifs.c :
+    collect prototype for ifs_yyerror() in "ifs_yacc_y.h", and fix return type
+
 2010-10-15  Robert Larice
  * src/xspice/cmpp/mod_lex.l ,
  * src/xspice/cmpp/mod_yacc.y ,
diff --git a/src/xspice/cmpp/ifs_lex.l b/src/xspice/cmpp/ifs_lex.l
index a2e2c5252..73956c640 100755
--- a/src/xspice/cmpp/ifs_lex.l
+++ b/src/xspice/cmpp/ifs_lex.l
@@ -51,7 +51,6 @@ NON-STANDARD FEATURES
 
 int yyival;
 double yydval;
-extern void ifs_yyerror (char*);
 
 /*
  * IFS specs are case insensitive:
diff --git a/src/xspice/cmpp/ifs_yacc.y b/src/xspice/cmpp/ifs_yacc.y
index 914f1faff..c1a9eaad9 100755
--- a/src/xspice/cmpp/ifs_yacc.y
+++ b/src/xspice/cmpp/ifs_yacc.y
@@ -92,7 +92,6 @@ extern int yylineno;
 extern int yyival;
 extern double yydval;
 extern char *ifs_yytext;
-extern void yyerror (char*);
  extern int ifs_yylex(void);
 
 Boolean_t parser_just_names;
diff --git a/src/xspice/cmpp/ifs_yacc_y.h b/src/xspice/cmpp/ifs_yacc_y.h
index 611e9a786..0a26b278f 100755
--- a/src/xspice/cmpp/ifs_yacc_y.h
+++ b/src/xspice/cmpp/ifs_yacc_y.h
@@ -79,3 +79,6 @@ typedef struct ctype_list_s {
    My_Port_Type_t      ctype;
    struct ctype_list_s *next;
 } Ctype_List_t;
+
+
+extern void ifs_yyerror(char*);
diff --git a/src/xspice/cmpp/read_ifs.c b/src/xspice/cmpp/read_ifs.c
index f1b36f158..87786f95c 100755
--- a/src/xspice/cmpp/read_ifs.c
+++ b/src/xspice/cmpp/read_ifs.c
@@ -48,7 +48,7 @@ NON-STANDARD FEATURES
 
 #include <assert.h>
 #include <stdio.h>
-#include  "cmpp.h"
+#include  "ifs_yacc_y.h"
 
 extern char *prog_name;
 extern int ifs_yyparse (void);
@@ -167,12 +167,10 @@ static Status_t read_ifs_table(
 
 /*---------------------------------------------------------------------------*/
    
-int
+void
 ifs_yyerror (char *str)
 {
    fprintf (stderr, "%s: Error: \"%s\": line %d (near \'%s\'):\n\t%s.\n",
 	    prog_name, current_filename, ifs_yylineno, ifs_yytext, str);
-
-   return 0;
 }