diff --git a/src/wren_compiler.c b/src/wren_compiler.c
index 2256644e..ebedf614 100644
--- a/src/wren_compiler.c
+++ b/src/wren_compiler.c
@@ -2019,9 +2019,9 @@ GrammarRule rules[] =
   /* TOKEN_PERCENT       */ INFIX_OPERATOR(PREC_TERM, "% "),
   /* TOKEN_PLUS          */ INFIX_OPERATOR(PREC_TERM, "+ "),
   /* TOKEN_MINUS         */ OPERATOR("- "),
-  /* TOKEN_PIPE          */ UNUSED,
+  /* TOKEN_PIPE          */ INFIX_OPERATOR(PREC_BITWISE, "| "),
   /* TOKEN_PIPEPIPE      */ INFIX(PREC_LOGIC, or),
-  /* TOKEN_AMP           */ UNUSED,
+  /* TOKEN_AMP           */ INFIX_OPERATOR(PREC_BITWISE, "& "),
   /* TOKEN_AMPAMP        */ INFIX(PREC_LOGIC, and),
   /* TOKEN_BANG          */ PREFIX_OPERATOR("!"),
   /* TOKEN_TILDE         */ PREFIX_OPERATOR("~"),
diff --git a/test/custom_operators/bitwise.wren b/test/custom_operators/bitwise.wren
new file mode 100644
index 00000000..086d2849
--- /dev/null
+++ b/test/custom_operators/bitwise.wren
@@ -0,0 +1,11 @@
+class Amp {
+  & that {
+    return
+  }
+}
+
+class Pipe {
+  | that {
+    return
+  }
+}