diff --git a/src/main/java/org/xerial/snappy/Snappy.java b/src/main/java/org/xerial/snappy/Snappy.java
index 2247498..96f1670 100755
--- a/src/main/java/org/xerial/snappy/Snappy.java
+++ b/src/main/java/org/xerial/snappy/Snappy.java
@@ -354,7 +354,7 @@ public class Snappy
      *            the input byte size
      * @return compressed data
      */
-    public static byte[] rawCompress(Object data, int byteSize) {
+    public static byte[] rawCompress(Object data, int byteSize) throws IOException {
         byte[] buf = new byte[Snappy.maxCompressedLength(byteSize)];
         int compressedByteSize = ((SnappyNativeAPI) impl).rawCompress(data, 0, byteSize, buf, 0);
         byte[] result = new byte[compressedByteSize];
diff --git a/src/main/java/org/xerial/snappy/SnappyNative.h b/src/main/java/org/xerial/snappy/SnappyNative.h
index 37452d9..477d30a 100755
--- a/src/main/java/org/xerial/snappy/SnappyNative.h
+++ b/src/main/java/org/xerial/snappy/SnappyNative.h
@@ -15,6 +15,22 @@ extern "C" {
 JNIEXPORT jstring JNICALL Java_org_xerial_snappy_SnappyNative_nativeLibraryVersion
   (JNIEnv *, jobject);
 
+/*
+ * Class:     org_xerial_snappy_SnappyNative
+ * Method:    rawCompress
+ * Signature: (JJJ)J
+ */
+JNIEXPORT jlong JNICALL Java_org_xerial_snappy_SnappyNative_rawCompress__JJJ
+  (JNIEnv *, jobject, jlong, jlong, jlong);
+
+/*
+ * Class:     org_xerial_snappy_SnappyNative
+ * Method:    rawUncompress
+ * Signature: (JJJ)J
+ */
+JNIEXPORT jlong JNICALL Java_org_xerial_snappy_SnappyNative_rawUncompress__JJJ
+  (JNIEnv *, jobject, jlong, jlong, jlong);
+
 /*
  * Class:     org_xerial_snappy_SnappyNative
  * Method:    rawCompress
@@ -71,6 +87,14 @@ JNIEXPORT jint JNICALL Java_org_xerial_snappy_SnappyNative_uncompressedLength__L
 JNIEXPORT jint JNICALL Java_org_xerial_snappy_SnappyNative_uncompressedLength__Ljava_lang_Object_2II
   (JNIEnv *, jobject, jobject, jint, jint);
 
+/*
+ * Class:     org_xerial_snappy_SnappyNative
+ * Method:    uncompressedLength
+ * Signature: (JJ)J
+ */
+JNIEXPORT jlong JNICALL Java_org_xerial_snappy_SnappyNative_uncompressedLength__JJ
+  (JNIEnv *, jobject, jlong, jlong);
+
 /*
  * Class:     org_xerial_snappy_SnappyNative
  * Method:    isValidCompressedBuffer
diff --git a/src/main/java/org/xerial/snappy/SnappyNative.java b/src/main/java/org/xerial/snappy/SnappyNative.java
index 3c9acf5..fdcb617 100755
--- a/src/main/java/org/xerial/snappy/SnappyNative.java
+++ b/src/main/java/org/xerial/snappy/SnappyNative.java
@@ -54,7 +54,7 @@ public class SnappyNative implements SnappyNativeAPI
     public native int rawCompress(ByteBuffer input, int inputOffset, int inputLength, ByteBuffer compressed,
             int outputOffset) throws IOException;
 
-    public native int rawCompress(Object input, int inputOffset, int inputByteLength, Object output, int outputOffset);
+    public native int rawCompress(Object input, int inputOffset, int inputByteLength, Object output, int outputOffset) throws IOException;
 
     public native int rawUncompress(ByteBuffer compressed, int inputOffset, int inputLength, ByteBuffer uncompressed,
             int outputOffset) throws IOException;
diff --git a/src/main/java/org/xerial/snappy/SnappyNativeAPI.java b/src/main/java/org/xerial/snappy/SnappyNativeAPI.java
index 902e22e..b6c92d0 100755
--- a/src/main/java/org/xerial/snappy/SnappyNativeAPI.java
+++ b/src/main/java/org/xerial/snappy/SnappyNativeAPI.java
@@ -51,7 +51,7 @@ public interface SnappyNativeAPI
     public int rawCompress(ByteBuffer input, int inputOffset, int inputLength, ByteBuffer compressed, int outputOffset)
             throws IOException;
 
-    public int rawCompress(Object input, int inputOffset, int inputByteLength, Object output, int outputOffset);
+    public int rawCompress(Object input, int inputOffset, int inputByteLength, Object output, int outputOffset) throws IOException;
 
     public int rawUncompress(ByteBuffer compressed, int inputOffset, int inputLength, ByteBuffer uncompressed,
             int outputOffset) throws IOException;