diff --git a/include/libssh/misc.h b/include/libssh/misc.h
index efac4445..5044817a 100644
--- a/include/libssh/misc.h
+++ b/include/libssh/misc.h
@@ -98,5 +98,5 @@ int ssh_quote_file_name(const char *file_name, char *buf, size_t buf_len);
 int ssh_newline_vis(const char *string, char *buf, size_t buf_len);
 int ssh_tmpname(char *template);
 
-char *ssh_strreplace(char *src, const char *pattern, const char *repl);
+char *ssh_strreplace(const char *src, const char *pattern, const char *repl);
 #endif /* MISC_H_ */
diff --git a/src/misc.c b/src/misc.c
index 52ca3a47..faa185f9 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -1799,7 +1799,7 @@ err:
  * @returns  src_replaced a pointer that points to the replaced string.
  * NULL if allocation fails or if src is NULL.
  */
-char *ssh_strreplace(char *src, const char *pattern, const char *replace)
+char *ssh_strreplace(const char *src, const char *pattern, const char *replace)
 {
     char *p = NULL;
     char *src_replaced = NULL;