diff --git a/lib/prawn/document.rb b/lib/prawn/document.rb
index a611a6f5b..21b477066 100644
--- a/lib/prawn/document.rb
+++ b/lib/prawn/document.rb
@@ -721,7 +721,7 @@ def apply_margin_options(options)
       }[margin.length]
 
       sides.zip(positions).each do |side, pos|
-        new_margin = options["#{side}_margin"] || (margin[pos] if pos)
+        new_margin = options[:"#{side}_margin"] || (margin[pos] if pos)
         state.page.margins[side] = new_margin if new_margin
       end
     end
diff --git a/spec/prawn/document_spec.rb b/spec/prawn/document_spec.rb
index 497fd244d..55a77e94d 100644
--- a/spec/prawn/document_spec.rb
+++ b/spec/prawn/document_spec.rb
@@ -153,6 +153,12 @@ def self.format(string)
         described_class.new.start_new_page({ margin: 0 }.freeze)
       end.to_not raise_error
     end
+
+    it "it sets individual page margins" do
+      doc = described_class.new
+      doc.start_new_page({ top_margin: 42 })
+      expect(doc.page.margins[:top]).to eq(42)
+    end
   end
 
   describe '#page_number' do