diff --git a/rsocket-core/src/main/java/io/rsocket/ConnectionSetupPayload.java b/rsocket-core/src/main/java/io/rsocket/ConnectionSetupPayload.java
index 49724beff..63640b9b2 100644
--- a/rsocket-core/src/main/java/io/rsocket/ConnectionSetupPayload.java
+++ b/rsocket-core/src/main/java/io/rsocket/ConnectionSetupPayload.java
@@ -30,7 +30,6 @@ public abstract class ConnectionSetupPayload extends AbstractReferenceCounted im
 
   public static final int NO_FLAGS = 0;
   public static final int HONOR_LEASE = SetupFrameFlyweight.FLAGS_WILL_HONOR_LEASE;
-  public static final int STRICT_INTERPRETATION = SetupFrameFlyweight.FLAGS_STRICT_INTERPRETATION;
 
   public static ConnectionSetupPayload create(String metadataMimeType, String dataMimeType) {
     return new DefaultConnectionSetupPayload(
@@ -73,10 +72,6 @@ public boolean willClientHonorLease() {
     return Frame.isFlagSet(getFlags(), HONOR_LEASE);
   }
 
-  public boolean doesClientRequestStrictInterpretation() {
-    return STRICT_INTERPRETATION == (getFlags() & STRICT_INTERPRETATION);
-  }
-
   @Override
   public boolean hasMetadata() {
     return Frame.isFlagSet(getFlags(), FLAGS_M);
diff --git a/rsocket-core/src/main/java/io/rsocket/RSocketFactory.java b/rsocket-core/src/main/java/io/rsocket/RSocketFactory.java
index f69630757..d47cdc1dd 100644
--- a/rsocket-core/src/main/java/io/rsocket/RSocketFactory.java
+++ b/rsocket-core/src/main/java/io/rsocket/RSocketFactory.java
@@ -82,7 +82,7 @@ public static class ClientRSocketFactory implements ClientTransportAcceptor {
     private Consumer<Throwable> errorConsumer = Throwable::printStackTrace;
     private int mtu = 0;
     private PluginRegistry plugins = new PluginRegistry(Plugins.defaultPlugins());
-    private int flags = SetupFrameFlyweight.FLAGS_STRICT_INTERPRETATION;
+    private int flags = 0;
 
     private Payload setupPayload = EmptyPayload.INSTANCE;
     private Function<Frame, ? extends Payload> frameDecoder = DefaultPayload::create;
diff --git a/rsocket-core/src/main/java/io/rsocket/frame/SetupFrameFlyweight.java b/rsocket-core/src/main/java/io/rsocket/frame/SetupFrameFlyweight.java
index 020a38c84..408bcdc7d 100644
--- a/rsocket-core/src/main/java/io/rsocket/frame/SetupFrameFlyweight.java
+++ b/rsocket-core/src/main/java/io/rsocket/frame/SetupFrameFlyweight.java
@@ -32,17 +32,9 @@ private SetupFrameFlyweight() {}
   public static final int FLAGS_RESUME_ENABLE = 0b00_1000_0000;
   /** A flag used to indicate that the client will honor LEASE sent by the server */
   public static final int FLAGS_WILL_HONOR_LEASE = 0b00_0100_0000;
-  /**
-   * (obsolete) flag indicating that the server should reject the SETUP if it finds anything
-   * in the data or metadata that it doesn't understand
-   *
-   * @deprecated removed between protocol version 0.2 and 1.0RC
-   */
-  @Deprecated
-  public static final int FLAGS_STRICT_INTERPRETATION = 0b00_0010_0000;
 
   public static final int VALID_FLAGS =
-      FLAGS_RESUME_ENABLE | FLAGS_WILL_HONOR_LEASE | FLAGS_STRICT_INTERPRETATION | FLAGS_M;
+      FLAGS_RESUME_ENABLE | FLAGS_WILL_HONOR_LEASE | FLAGS_M;
 
   public static final int CURRENT_VERSION = VersionFlyweight.encode(1, 0);