diff --git a/test/testbool.cpp b/test/testbool.cpp
index 3d63745ce..e553743ea 100644
--- a/test/testbool.cpp
+++ b/test/testbool.cpp
@@ -851,6 +851,12 @@ private:
               "  return f() | f();\n"
               "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        check("uint8 outcode(float p) {\n"
+              "    float d = 0.;\n"
+              "    return ((p - xm >= d) << 1) | (x - p > d);\n"
+              "}\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void incrementBoolean() {