diff --git a/mfhdf/ncgen/ncgen.l b/mfhdf/ncgen/ncgen.l
index c9bdd472ad..2a56dbd443 100644
--- a/mfhdf/ncgen/ncgen.l
+++ b/mfhdf/ncgen/ncgen.l
@@ -7,7 +7,6 @@
 /* lex specification for tokens for ncgen */
 
 char errstr[100];        /* for short error messages */
-extern long strtol();
 void expand_escapes();
 
 #include <ctype.h>
diff --git a/mfhdf/ncgen/ncgenyy.c b/mfhdf/ncgen/ncgenyy.c
index 7c5537e99a..8e12bd4a5e 100644
--- a/mfhdf/ncgen/ncgenyy.c
+++ b/mfhdf/ncgen/ncgenyy.c
@@ -642,7 +642,6 @@ char *yytext;
 /* lex specification for tokens for ncgen */
 
 char errstr[100];        /* for short error messages */
-extern long strtol();
 void expand_escapes();
 
 #include <string.h>