diff --git a/jszip/jszip-tests.ts b/jszip/jszip-tests.ts
index 97fd104505..514beb5012 100644
--- a/jszip/jszip-tests.ts
+++ b/jszip/jszip-tests.ts
@@ -33,18 +33,18 @@ function testJSZip() {
 	var folder = newJszip.folder("test");
 	if(folder.file("test.txt").asText() == "test string") {
 		log(SEVERITY.INFO, "all ok");
-	} 
+	}
 	else {
 		log(SEVERITY.ERROR, "wrong file");
 	}
 
 	var folders = newJszip.folder(new RegExp("^test"));
-	
+
 	if(folders.length == 1) {
 		log(SEVERITY.INFO, "all ok");
 		if(folders[0].dir == true) {
 			log(SEVERITY.INFO, "all ok");
-		} 
+		}
 		else {
 			log(SEVERITY.ERROR, "wrong file");
 		}
@@ -59,14 +59,14 @@ function testJSZip() {
 			log(SEVERITY.INFO, "all ok");
 		}
 		else {
-			log(SEVERITY.ERROR, "wrong data in files");	
+			log(SEVERITY.ERROR, "wrong data in files");
 		}
-	} 
+	}
 	else {
 		log(SEVERITY.ERROR, "wrong number of files");
 	}
 
-	var filterFiles = newJszip.filter((relativePath: string, file: JSZipObject) => { 
+	var filterFiles = newJszip.filter((relativePath: string, file: JSZipObject) => {
         if (file.asText() == "test string") {
 			return true;
 		}
@@ -82,7 +82,7 @@ function testJSZip() {
 
 	newJszip.remove("test/test.txt");
 
-	filterFiles = newJszip.filter((relativePath: string, file: JSZipObject) => { 
+	filterFiles = newJszip.filter((relativePath: string, file: JSZipObject) => {
         if (file.asText() == "test string") {
 			return true;
 		}
@@ -95,24 +95,43 @@ function testJSZip() {
 	else {
 		log(SEVERITY.ERROR, "wrong number of files");
 	}
+
+	var uncompressedStr = JSZip.compressions.DEFLATE.uncompress(
+		JSZip.compressions.DEFLATE.compress("\0\1\2\3\4\5\6\7",{level:9}));
+	var uncompressedArr = JSZip.compressions.DEFLATE.uncompress(
+		JSZip.compressions.DEFLATE.compress([0,1,2,3,4,5,6,7],{level:9}));
+	var uncompressedUint8Arr = JSZip.compressions.DEFLATE.uncompress(
+		JSZip.compressions.DEFLATE.compress(new Uint8Array([0,1,2,3,4,5,6,7]),{level:9}));
+
+	var every_match = [0,1,2,3,4,5,6,7].every(function(val, i){
+		return uncompressedStr[i] === val &&
+					 uncompressedArr[i] === val &&
+					 uncompressedUint8Arr[i] === val;
+	});
+	if(every_match) {
+		log(SEVERITY.INFO, "compress and uncompress ok.");
+	}else{
+		log(SEVERITY.ERROR, "compress or uncompress failed.");
+	}
+
 }
 
 function log(severity:number, message: any) {
 	var log = "";
 	switch(severity) {
-		case 0: 
+		case 0:
 			log += "[DEBUG] ";
 			break;
-		case 1: 
+		case 1:
 			log += "[INFO] ";
 			break;
-		case 2: 
+		case 2:
 			log += "[WARN] ";
 			break;
-		case 3: 
+		case 3:
 			log += "[ERROR] ";
 			break;
-		case 4: 
+		case 4:
 			log += "[FATAL] ";
 			break;
 		default:
@@ -122,4 +141,4 @@ function log(severity:number, message: any) {
 	console.log(log += message);
 }
 
-testJSZip();
\ No newline at end of file
+testJSZip();
diff --git a/jszip/jszip.d.ts b/jszip/jszip.d.ts
index df571793b3..651a26da54 100644
--- a/jszip/jszip.d.ts
+++ b/jszip/jszip.d.ts
@@ -32,7 +32,7 @@ interface JSZip {
 
     /**
      * Return an new JSZip instance with the given folder as root
-     * 
+     *
      * @param name Name of the folder
      * @return New JSZip object with the given folder as root or null
      */
@@ -40,7 +40,7 @@ interface JSZip {
 
     /**
      * Returns new JSZip instances with the matching folders as root
-     * 
+     *
      * @param name RegExp to match
      * @return New array of JSZipFile objects which match the RegExp
      */
@@ -56,7 +56,7 @@ interface JSZip {
 
     /**
      * Removes the file or folder from the archive
-     * 
+     *
      * @param path Relative path of file or folder
      * @return Returns the JSZip instance
      */
@@ -140,6 +140,18 @@ interface JSZipSupport {
     nodebuffer: boolean;
 }
 
+interface DEFLATE {
+    /** pako.deflateRaw, level:0-9 */
+    compress(input: string, compressionOptions: {level:number}): Uint8Array;
+    compress(input: number[], compressionOptions: {level:number}): Uint8Array;
+    compress(input: Uint8Array, compressionOptions: {level:number}): Uint8Array;
+
+    /** pako.inflateRaw */
+    uncompress(input: string): Uint8Array;
+    uncompress(input: number[]): Uint8Array;
+    uncompress(input: Uint8Array): Uint8Array;
+}
+
 declare var JSZip: {
     /**
      * Create JSZip instance
@@ -169,6 +181,9 @@ declare var JSZip: {
 
     prototype: JSZip;
     support: JSZipSupport;
+    compressions: {
+      DEFLATE: DEFLATE;
+    }
 }
 
 declare module "jszip" {