diff --git a/lib/sensu/settings/validators/check.rb b/lib/sensu/settings/validators/check.rb
index b87f3fa..8ed8a65 100644
--- a/lib/sensu/settings/validators/check.rb
+++ b/lib/sensu/settings/validators/check.rb
@@ -53,17 +53,6 @@ def validate_check_flap_detection(check)
           end
         end
 
-        # Validate check masquerade.
-        # Validates: masquerade
-        #
-        # @param check [Hash] sensu check definition.
-        def validate_check_masquerade(check)
-          must_be_a_string(check[:masquerade]) ||
-            invalid(check, "check masquerade must be a string")
-          must_match_regex(/^[\w\.-]+$/, check[:masquerade]) ||
-            invalid(check, "check masquerade cannot contain spaces or special characters")
-        end
-
         # Validate a Sensu check definition.
         #
         # @param check [Hash] sensu check definition.
@@ -76,12 +65,11 @@ def validate_check(check)
             invalid(check, "check command must be a string")
           must_be_a_numeric_if_set(check[:timeout]) ||
             invalid(check, "check timeout must be numeric")
+          must_be_a_string_if_set(check[:source]) ||
+            invalid(check, "check source must be a string")
           validate_check_scheduling(check)
           validate_check_handling(check)
           validate_check_flap_detection(check)
-          if check[:masquerade]
-            validate_check_masquerade(check)
-          end
           if check[:subdue]
             validate_subdue(check)
           end
diff --git a/spec/validator_spec.rb b/spec/validator_spec.rb
index 84904e2..8d5ad3f 100644
--- a/spec/validator_spec.rb
+++ b/spec/validator_spec.rb
@@ -141,13 +141,10 @@
     check[:high_flap_threshold] = 55
     @validator.validate_check(check)
     expect(@validator.reset).to eq(0)
-    check[:masquerade] = 1
-    @validator.validate_check(check)
-    expect(@validator.reset).to eq(2)
-    check[:masquerade] = "%&@*"
+    check[:source] = 1
     @validator.validate_check(check)
     expect(@validator.reset).to eq(1)
-    check[:masquerade] = "i-424242"
+    check[:source] = "switch-%42%"
     @validator.validate_check(check)
     expect(@validator.reset).to eq(0)
   end