diff --git a/sasl_defs.c b/sasl_defs.c
index 2e2c577..46a0866 100644
--- a/sasl_defs.c
+++ b/sasl_defs.c
@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sasl/saslplug.h>
 
 #ifdef HAVE_SASL_CB_GETCONF
 /* The locations we may search for a SASL config file if the user didn't
@@ -141,7 +142,7 @@ static sasl_callback_t sasl_callbacks[] = {
    { SASL_CB_SERVER_USERDB_CHECKPASS, sasl_server_userdb_checkpass, NULL },
 #endif
 
-   { SASL_CB_LOG, sasl_log, NULL },
+   { SASL_CB_LOG, (sasl_callback_ft)sasl_log, NULL },
 
 #ifdef HAVE_SASL_CB_GETCONF
    { SASL_CB_GETCONF, sasl_getconf, NULL },