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-rw-r--r--libguile/strports.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libguile/strports.h b/libguile/strports.h
index 9bccfe161..0310c6245 100644
--- a/libguile/strports.h
+++ b/libguile/strports.h
@@ -50,7 +50,7 @@ extern scm_ptobfuns scm_stptob;
-extern SCM scm_mkstrport SCM_P ((SCM pos, SCM str, long modes, char * caller));
+extern SCM scm_mkstrport SCM_P ((SCM pos, SCM str, long modes, const char * caller));
extern SCM scm_call_with_output_string SCM_P ((SCM proc));
extern SCM scm_strprint_obj SCM_P ((SCM obj));
extern SCM scm_call_with_input_string SCM_P ((SCM str, SCM proc));