1 files changed, 1 insertions, 1 deletions

diff --git a/readpass.h b/readpass.h
index d8da448a7..38d11af6b 100644
--- a/readpass.h
+++ b/readpass.h
@@ -17,4 +17,4 @@
  * passphrase (allocated with xmalloc).  Exits if EOF is encountered. If
  * from_stdin is true, the passphrase will be read from stdin instead.
  */
-char   *read_passphrase(char *prompt, int from_stdin);
+char   *read_passphrase(const char *prompt, int from_stdin);