diff --git a/WINGs/WINGs/WUtil.h b/WINGs/WINGs/WUtil.h
index 727377fd..35bcedbf 100644
--- a/WINGs/WINGs/WUtil.h
+++ b/WINGs/WINGs/WUtil.h
@@ -621,8 +621,6 @@ void WMGetDataBytesWithLength(WMData *aData, void *buffer, unsigned length);
 
 void WMGetDataBytesWithRange(WMData *aData, void *buffer, WMRange aRange);
 
-WMData* WMGetSubdataWithRange(WMData *aData, WMRange aRange);
-
 /* Testing data */
 
 Bool WMIsDataEqualToData(WMData *aData, WMData *anotherData);
diff --git a/WINGs/data.c b/WINGs/data.c
index f4489099..f42a5c37 100644
--- a/WINGs/data.c
+++ b/WINGs/data.c
@@ -195,22 +195,6 @@ void WMGetDataBytesWithRange(WMData * aData, void *buffer, WMRange aRange)
 	memcpy(buffer, (unsigned char *)aData->bytes + aRange.position, aRange.count);
 }
 
-WMData *WMGetSubdataWithRange(WMData * aData, WMRange aRange)
-{
-	void *buffer;
-	WMData *newData;
-
-	if (aRange.count <= 0)
-		return WMCreateDataWithCapacity(0);
-
-	buffer = wmalloc(aRange.count);
-	WMGetDataBytesWithRange(aData, buffer, aRange);
-	newData = WMCreateDataWithBytesNoCopy(buffer, aRange.count, wfree);
-	newData->format = aData->format;
-
-	return newData;
-}
-
 /* Testing data */
 
 Bool WMIsDataEqualToData(WMData * aData, WMData * anotherData)