diff --git a/modules/quercus/src/com/caucho/quercus/lib/HashModule.java b/modules/quercus/src/com/caucho/quercus/lib/HashModule.java
index 6c9d29c..39a6393 100644
--- a/modules/quercus/src/com/caucho/quercus/lib/HashModule.java
+++ b/modules/quercus/src/com/caucho/quercus/lib/HashModule.java
@@ -79,6 +79,10 @@ public class HashModule extends AbstractQuercusModule {
 		    StringValue string,
 		    @Optional boolean isBinary)
   {
+    if (_algorithmMap.containsKey(algorithm)) {
+      algorithm = _algorithmMap.get(algorithm);
+    }
+
     try {
       MessageDigest digest = MessageDigest.getInstance(algorithm);
       
@@ -138,6 +142,10 @@ public class HashModule extends AbstractQuercusModule {
 			 Path path,
 			 @Optional boolean isBinary)
   {
+    if (_algorithmMap.containsKey(algorithm)) {
+      algorithm = _algorithmMap.get(algorithm);
+    }
+
     try {
       MessageDigest digest = MessageDigest.getInstance(algorithm);
 
@@ -224,6 +232,10 @@ public class HashModule extends AbstractQuercusModule {
 			       @Optional int options,
 			       @Optional StringValue keyString)
   {
+    if (_algorithmMap.containsKey(algorithm)) {
+      algorithm = _algorithmMap.get(algorithm);
+    }
+
     try {
       if (options == HASH_HMAC) {
         algorithm = "Hmac" + algorithm;