diff --git a/TimberWinR.UnitTests/GrokFilterTests.cs b/TimberWinR.UnitTests/GrokFilterTests.cs
index 436b34c..69d572a 100644
--- a/TimberWinR.UnitTests/GrokFilterTests.cs
+++ b/TimberWinR.UnitTests/GrokFilterTests.cs
@@ -106,6 +106,108 @@ namespace TimberWinR.UnitTests
             Assert.IsNull(json["LogFilename"]);        
         }
 
+        [Test]
+        public void TestDropConditions()
+        {
+            JObject json1 = new JObject
+            {
+                {"LogFilename", @"C:\\Logs1\\test1.log"},
+                {"EventType", 1},
+                {"Index", 7},
+                {"Text", null},
+                {
+                    "tags", new JArray
+                    {
+                        "tag1",
+                        "tag2"
+                    }
+                },
+                {"type", "Win32-FileLog"},
+                {"ComputerName", "dev.vistaprint.net"}
+            };
+
+            JObject json2 = new JObject
+            {
+                {"LogFilename", @"C:\\Logs1\\test1.log"},
+                {"EventType", 2},
+                {"Index", 7},
+                {"Text", null},
+                {
+                    "tags", new JArray
+                    {
+                        "tag1",
+                        "tag2"
+                    }
+                },
+                {"type", "Win32-FileLog"},
+                {"ComputerName", "dev.vistaprint.net"}
+            };
+
+
+            string grokJsonDropIf1 = @"{  
+            ""TimberWinR"":{        
+                ""Filters"":[  
+	                {  
+		            ""grok"":{                          
+		                ""condition"": ""[EventType] == 1"",
+                        ""drop"": ""true"",
+		                ""match"":[  
+			                ""Text"",
+			                """"
+		                ],
+                        ""remove_tag"":[  
+                            ""tag1""                          
+                        ]		               
+		            }
+	                }]
+                }
+            }";
+
+            string grokJsonDropIfNot1 = @"{  
+            ""TimberWinR"":{        
+                ""Filters"":[  
+	                {  
+		            ""grok"":{                          
+		                ""condition"": ""[EventType] != 1"",
+                        ""drop"": ""true"",
+		                ""match"":[  
+			                ""Text"",
+			                """"
+		                ],
+                        ""remove_tag"":[  
+//                            ""tag1""                          
+                        ]		               
+		            }
+	                }]
+                }
+            }";
+
+
+            // Positive Tests
+            Configuration c = Configuration.FromString(grokJsonDropIf1);
+            Grok grok = c.Filters.First() as Grok;
+            Assert.IsFalse(grok.Apply(json1));
+
+            c = Configuration.FromString(grokJsonDropIf1);
+            grok = c.Filters.First() as Grok;
+            Assert.IsTrue(grok.Apply(json2));
+
+            // Negative Tests
+            c = Configuration.FromString(grokJsonDropIfNot1);
+            grok = c.Filters.First() as Grok;
+            Assert.IsFalse(grok.Apply(json2));
+
+            c = Configuration.FromString(grokJsonDropIfNot1);
+            grok = c.Filters.First() as Grok;
+            Assert.IsTrue(grok.Apply(json1));
+
+
+
+
+        }
+
+
+
         [Test]
         public void TestConditions()
         {
@@ -191,7 +293,7 @@ namespace TimberWinR.UnitTests
             // Negative Test
             c = Configuration.FromString(grokJson3);
             grok = c.Filters.First() as Grok;
-            Assert.IsFalse(grok.Apply(json));
+            Assert.IsTrue(grok.Apply(json));
         }
 
         [Test]
diff --git a/TimberWinR/Filters/GrokFilter.cs b/TimberWinR/Filters/GrokFilter.cs
index dbfe3c5..7748c9f 100644
--- a/TimberWinR/Filters/GrokFilter.cs
+++ b/TimberWinR/Filters/GrokFilter.cs
@@ -32,6 +32,8 @@ namespace TimberWinR.Parser
 
     public partial class Grok : LogstashFilter
     {
+        // Returns: true - Filter does not apply or has been applied successfully
+        // Returns: false - Drop this object
         public override bool Apply(JObject json)
         {
             if (!string.IsNullOrEmpty(Type))
@@ -52,7 +54,7 @@ namespace TimberWinR.Parser
                             return false; // drop this one
                     }
                     else                   
-                        return false;                   
+                        return true;                   
                 }
 
                 if (DropIfMatch)
@@ -61,10 +63,10 @@ namespace TimberWinR.Parser
                 AddFields(json);
                 AddTags(json);               
                 RemoveFields(json);
-                RemoveTags(json);                
-                return true;
+                RemoveTags(json);                                
             }
-            return false;
+
+            return true;
         }
       
         private bool Matches(Newtonsoft.Json.Linq.JObject json)