diff --git a/core/src/main/java/org/bouncycastle/crypto/digests/Kangaroo.java b/core/src/main/java/org/bouncycastle/crypto/digests/Kangaroo.java
index a4033c5105..68a707a061 100644
--- a/core/src/main/java/org/bouncycastle/crypto/digests/Kangaroo.java
+++ b/core/src/main/java/org/bouncycastle/crypto/digests/Kangaroo.java
@@ -312,12 +312,6 @@ public int doFinal(final byte[] pOut,
                            final int pOutOffset,
                            final int pOutLen)
         {
-            /* Check that we are not already outputting */
-            if (squeezing)
-            {
-                throw new IllegalStateException("Already outputting");
-            }
-
             /* Build the required output */
             final int length = doOutput(pOut, pOutOffset, pOutLen);