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-rw-r--r--libguile/filesys.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libguile/filesys.h b/libguile/filesys.h
index 2a662aed2..12f8a3b01 100644
--- a/libguile/filesys.h
+++ b/libguile/filesys.h
@@ -74,7 +74,7 @@ extern SCM scm_closedir SCM_P ((SCM port));
extern SCM scm_chdir SCM_P ((SCM str));
extern SCM scm_getcwd SCM_P ((void));
extern SCM scm_select SCM_P ((SCM reads, SCM writes, SCM excepts, SCM secs, SCM msecs));
-extern int scm_input_waiting_p SCM_P ((FILE *file, char *caller));
+extern int scm_input_waiting_p SCM_P ((FILE *file, const char *caller));
extern SCM scm_fcntl (SCM object, SCM cmd, SCM value);
extern SCM scm_fsync (SCM object);
extern SCM scm_symlink SCM_P ((SCM oldpath, SCM newpath));