diff --git a/source/adapters/level_zero/memory.cpp b/source/adapters/level_zero/memory.cpp
index 82ecd7043b..4757a0563d 100644
--- a/source/adapters/level_zero/memory.cpp
+++ b/source/adapters/level_zero/memory.cpp
@@ -11,6 +11,7 @@
 #include <algorithm>
 #include <climits>
 #include <string.h>
+#include <ur/ur.hpp>
 
 #include "context.hpp"
 #include "event.hpp"
@@ -183,9 +184,6 @@ static ur_result_t enqueueMemFillHelper(ur_command_t CommandType,
                                         uint32_t NumEventsInWaitList,
                                         const ur_event_handle_t *EventWaitList,
                                         ur_event_handle_t *OutEvent) {
-  // Pattern size must be a power of two.
-  UR_ASSERT((PatternSize > 0) && ((PatternSize & (PatternSize - 1)) == 0),
-            UR_RESULT_ERROR_INVALID_VALUE);
   auto &Device = Queue->Device;
 
   // Make sure that pattern size matches the capability of the copy queues.
@@ -237,18 +235,42 @@ static ur_result_t enqueueMemFillHelper(ur_command_t CommandType,
   const auto &ZeCommandList = CommandList->first;
   const auto &WaitList = (*Event)->WaitList;
 
-  ZE2UR_CALL(zeCommandListAppendMemoryFill,
-             (ZeCommandList, Ptr, Pattern, PatternSize, Size, ZeEvent,
-              WaitList.Length, WaitList.ZeEventList));
+  // PatternSize must be a power of two for zeCommandListAppendMemoryFill.
+  // When it's not, the fill is emulated with zeCommandListAppendMemoryCopy.
+  if (isPowerOf2(PatternSize)) {
+    ZE2UR_CALL(zeCommandListAppendMemoryFill,
+               (ZeCommandList, Ptr, Pattern, PatternSize, Size, ZeEvent,
+                WaitList.Length, WaitList.ZeEventList));
 
-  logger::debug("calling zeCommandListAppendMemoryFill() with"
-                "  ZeEvent {}",
-                ur_cast<uint64_t>(ZeEvent));
-  printZeEventList(WaitList);
+    logger::debug("calling zeCommandListAppendMemoryFill() with"
+                  "  ZeEvent {}",
+                  ur_cast<uint64_t>(ZeEvent));
+    printZeEventList(WaitList);
 
-  // Execute command list asynchronously, as the event will be used
-  // to track down its completion.
-  UR_CALL(Queue->executeCommandList(CommandList, false, OkToBatch));
+    // Execute command list asynchronously, as the event will be used
+    // to track down its completion.
+    UR_CALL(Queue->executeCommandList(CommandList, false, OkToBatch));
+  } else {
+    // Copy pattern into every entry in memory array pointed by Ptr.
+    uint32_t NumOfCopySteps = Size / PatternSize;
+    const void *Src = Pattern;
+
+    for (uint32_t step = 0; step < NumOfCopySteps; ++step) {
+      void *Dst = reinterpret_cast<void *>(reinterpret_cast<uint8_t *>(Ptr) +
+                                           step * PatternSize);
+      ZE2UR_CALL(zeCommandListAppendMemoryCopy,
+                 (ZeCommandList, Dst, Src, PatternSize, ZeEvent,
+                  WaitList.Length, WaitList.ZeEventList));
+    }
+
+    logger::debug("calling zeCommandListAppendMemoryCopy() with"
+                  "  ZeEvent {}",
+                  ur_cast<uint64_t>(ZeEvent));
+    printZeEventList(WaitList);
+
+    // Execute command list synchronously.
+    UR_CALL(Queue->executeCommandList(CommandList, true, OkToBatch));
+  }
 
   return UR_RESULT_SUCCESS;
 }
diff --git a/source/adapters/opencl/usm.cpp b/source/adapters/opencl/usm.cpp
index 0d64f23d13..3f4382fc0d 100644
--- a/source/adapters/opencl/usm.cpp
+++ b/source/adapters/opencl/usm.cpp
@@ -8,6 +8,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include <ur/ur.hpp>
+
 #include "common.hpp"
 
 inline cl_mem_alloc_flags_intel
@@ -239,7 +241,7 @@ UR_APIEXPORT ur_result_t UR_APICALL urEnqueueUSMFill(
     return mapCLErrorToUR(CLErr);
   }
 
-  if (patternSize <= 128) {
+  if (patternSize <= 128 && isPowerOf2(patternSize)) {
     clEnqueueMemFillINTEL_fn EnqueueMemFill = nullptr;
     UR_RETURN_ON_FAILURE(
         cl_ext::getExtFuncFromContext<clEnqueueMemFillINTEL_fn>(