--- a/src/output.cpp
+++ b/src/output.cpp
@@ -364,7 +364,7 @@
     scoped_push<outputter_t *> push(&s_tputs_receiver, this);
     // On some systems, tputs takes a char*, on others a const char*.
     // Like tparm, we just cast it to unconst, that should work everywhere.
-    return tputs(const_cast<char *>(str), affcnt, tputs_writer);
+    return tputs(const_cast<char *>(str), affcnt, (int (*)(int)) tputs_writer);
 }
 
 /// Write a wide character to the outputter. This should only be used when writing characters from