diff --git a/compiler/tests-check-prim/main.output5 b/compiler/tests-check-prim/main.output5
index 112e3fc97e..66b036a36e 100644
--- a/compiler/tests-check-prim/main.output5
+++ b/compiler/tests-check-prim/main.output5
@@ -119,6 +119,9 @@ From +ints.js:
 caml_div
 caml_mod
 
+From +io.js:
+caml_ml_is_binary_mode
+
 From +jslib.js:
 caml_is_js
 caml_trampoline
diff --git a/compiler/tests-check-prim/unix-unix.output5 b/compiler/tests-check-prim/unix-unix.output5
index b3b2c6da0d..931388ea8c 100644
--- a/compiler/tests-check-prim/unix-unix.output5
+++ b/compiler/tests-check-prim/unix-unix.output5
@@ -230,6 +230,9 @@ From +ints.js:
 caml_div
 caml_mod
 
+From +io.js:
+caml_ml_is_binary_mode
+
 From +jslib.js:
 caml_is_js
 caml_trampoline