diff --git a/include/rapidjson/internal/clzll.h b/include/rapidjson/internal/clzll.h
index f43e6a7..73a54f6 100644
--- a/include/rapidjson/internal/clzll.h
+++ b/include/rapidjson/internal/clzll.h
@@ -34,31 +34,10 @@ inline uint32_t clzll(uint64_t x) {
     // infinite loop in the software implementation.
     RAPIDJSON_ASSERT(x != 0);
 
-#if defined(_MSC_VER)
+#if defined(_MSC_VER) && !defined(UNDER_CE)
     unsigned long r = 0;
 #if defined(_WIN64)
     _BitScanReverse64(&r, x);
-#elif defined(UNDER_CE)
-	// Scan the high 32 bits.
-	uint32_t high = static_cast<uint32_t>(x >> 32);
-	if (high != 0)
-	{
-		unsigned long index = 31;
-		while((high & (1U<<index)) == 0)
-		{
-			--index;
-		}
-		return index;
-	}
-	
-	// Scan the low 32 bits.
-	uint32_t low =static_cast<uint32_t>(x & 0xFFFFFFFF);
-	unsigned long index = 31;
-	while((low & (1U<<index)) == 0)
-	{
-		--index;
-	}
-	return index;
 #else
     // Scan the high 32 bits.
     if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32)))