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-rw-r--r--converter/other/pnmtorle.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/converter/other/pnmtorle.c b/converter/other/pnmtorle.c
index 0c256311..a75ab218 100644
--- a/converter/other/pnmtorle.c
+++ b/converter/other/pnmtorle.c
@@ -334,7 +334,7 @@ skipData(FILE      *  const ifP,
 
 
 int
-main(int argc, char ** argv) {
+main(int argc, const char ** argv) {
 
     struct CmdlineInfo cmdline;