diff --git a/lib/dotenv/parser.rb b/lib/dotenv/parser.rb
index ae30c187..d6bdec56 100644
--- a/lib/dotenv/parser.rb
+++ b/lib/dotenv/parser.rb
@@ -59,8 +59,6 @@ def parse_line(line)
         if variable_not_set?(line)
           raise FormatError, "Line #{line.inspect} has an unset variable"
         end
-      elsif line !~ /\A\s*(?:#.*)?\z/ # not comment or blank line
-        raise FormatError, "Line #{line.inspect} doesn't match format"
       end
     end
 
diff --git a/spec/dotenv/parser_spec.rb b/spec/dotenv/parser_spec.rb
index e28a237c..005ef0f8 100644
--- a/spec/dotenv/parser_spec.rb
+++ b/spec/dotenv/parser_spec.rb
@@ -114,8 +114,8 @@ def env(string)
     expect(env("foo=bar ")).to eql("foo" => "bar") # not 'bar '
   end
 
-  it "throws an error if line format is incorrect" do
-    expect { env("lol$wut") }.to raise_error(Dotenv::FormatError)
+  it "ignores lines that are not variable assignments" do
+    expect(env("lol$wut")).to eql({})
   end
 
   it "ignores empty lines" do