diff --git a/library/test/inspector.factor b/library/test/inspector.factor
index 509835b4e6..ed5017d3b8 100644
--- a/library/test/inspector.factor
+++ b/library/test/inspector.factor
@@ -12,3 +12,4 @@ V{ } clone inspector-stack set
 [ 1 2 3 ] (inspect)
 f (inspect)
 \ + (inspect)
+H{ } (inspect)
diff --git a/library/tools/inspector.factor b/library/tools/inspector.factor
index b74e04bf17..b41c3d0e6f 100644
--- a/library/tools/inspector.factor
+++ b/library/tools/inspector.factor
@@ -18,7 +18,7 @@ SYMBOL: inspector-stack
 : (inspect) ( obj -- )
     dup inspector-stack get push
     dup summary print
-    sheet sheet-numbers sheet. ;
+    sheet dup empty? [ drop ] [ sheet-numbers sheet. ] if ;
 
 : inspector-help ( -- )
     "Object inspector." print