diff --git a/newlib/doc/makedoc.c b/newlib/doc/makedoc.c
index 3f4ff4c06..3faad96a2 100644
--- a/newlib/doc/makedoc.c
+++ b/newlib/doc/makedoc.c
@@ -1287,13 +1287,13 @@ DEFUN(compile, (string),
 		     /* Got a number, embedd the magic push number
 			function */
 		     add_to_definition(ptr, push_number);
-		     add_to_definition(ptr, atol(word));
+		     add_to_definition(ptr, (stinst_type)atol(word));
 		     break;
 		   default:
 		     add_to_definition(ptr, call);
 		     lookup = lookup_word(word);
 		     if (!lookup) ret++;
-		     add_to_definition(ptr, lookup);
+		     add_to_definition(ptr, (stinst_type)lookup);
 		 }
 
 		string = nextword(string, &word);