diff --git a/lib/isc/error.c b/lib/isc/error.c
index 925e3c45e2..682f69e1cd 100644
--- a/lib/isc/error.c
+++ b/lib/isc/error.c
@@ -66,7 +66,7 @@ isc_error_fatal(char *file, int line, char *format, ...) {
 
 void
 isc_error_runtimecheck(char *file, int line, char *expression) {
-	(fatal_callback)(file, line, "RUNTIME_CHECK(%s) failed.", expression);
+	isc_error_fatal(file, line, "RUNTIME_CHECK(%s) failed.", expression);
 }
 
 static void