diff --git a/core/math/math-docs.factor b/core/math/math-docs.factor
index d98685fb48..97e0a1e7cf 100644
--- a/core/math/math-docs.factor
+++ b/core/math/math-docs.factor
@@ -282,12 +282,12 @@ HELP: fp-bitwise=
 { $examples
     "Not-a-number equality:"
     { $example
-        "USING: math prettyprint ;"
+        "USING: kernel math prettyprint ;"
         "0.0 0.0 / dup number= ."
         "f"
     }
     { $example
-        "USING: math prettyprint ;"
+        "USING: kernel math prettyprint ;"
         "0.0 0.0 / dup fp-bitwise= ."
         "t"
     }
@@ -299,7 +299,7 @@ HELP: fp-bitwise=
     }
     { $example
         "USING: math prettyprint ;"
-        "-0.0 0.0 = ."
+        "-0.0 0.0 number= ."
         "t"
     }
 } ;
diff --git a/core/syntax/syntax-docs.factor b/core/syntax/syntax-docs.factor
index 19e644cb68..0a11f62c16 100644
--- a/core/syntax/syntax-docs.factor
+++ b/core/syntax/syntax-docs.factor
@@ -612,8 +612,8 @@ HELP: NAN:
 { $examples
     { $example
         "USE: prettyprint"
-        "NAN: deadbeef ."
-        "NAN: deadbeef"
+        "NAN: 80000deadbeef ."
+        "NAN: 80000deadbeef"
     }
 } ;