diff --git a/bc/Unicode.cpp b/bc/Unicode.cpp
index 188f88c..d38d84b 100644
--- a/bc/Unicode.cpp
+++ b/bc/Unicode.cpp
@@ -62,7 +62,7 @@ static const uint8_t bytesFromUTF8[] = {
 };
 
 int32_t ConvertUTF16to8(uint8_t* dst, uint32_t dstmaxchars, const uint16_t* src, uint32_t srcmaxchars, uint32_t* dstchars, uint32_t* srcchars) {
-    auto srcend   = srcmaxchars & 0x80000000 ? std::numeric_limits<const uint16_t*>::max() : &src[srcmaxchars];
+    auto srcend   = srcmaxchars & 0x80000000 ? reinterpret_cast<const uint16_t*>(UINTPTR_MAX) : &src[srcmaxchars];
     auto dstend   = &dst[dstmaxchars];
     auto dststart = dst;
     auto srcstart = src;
@@ -156,7 +156,7 @@ done:
 }
 
 int32_t ConvertUTF8to16(uint16_t* dst, uint32_t dstmaxchars, const uint8_t* src, uint32_t srcmaxchars, uint32_t* dstchars, uint32_t* srcchars) {
-    auto srcend   = srcmaxchars & 0x80000000 ? std::numeric_limits<const uint8_t*>::max() : src + srcmaxchars;
+    auto srcend   = srcmaxchars & 0x80000000 ? reinterpret_cast<const uint8_t*>(UINTPTR_MAX) : src + srcmaxchars;
     auto dstend   = dst + dstmaxchars;
     auto dststart = dst;
     auto srcstart = src;