diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
index 4cdb9a579..2fff7f8f4 100644
--- a/src/lib_json/json_reader.cpp
+++ b/src/lib_json/json_reader.cpp
@@ -781,7 +781,11 @@ std::string Reader::getLocationLineAndColumn(Location location) const {
   getLocationLineAndColumn(location, line, column);
   char buffer[18 + 16 + 16 + 1];
 #if defined(_MSC_VER) && defined(__STDC_SECURE_LIB__)
+  #if defined(WINCE)
+  _snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
+  #else
   sprintf_s(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
+  #endif
 #else
   snprintf(buffer, sizeof(buffer), "Line %d, Column %d", line, column);
 #endif
diff --git a/src/lib_json/json_writer.cpp b/src/lib_json/json_writer.cpp
index d770cfaf8..d20cf12ae 100644
--- a/src/lib_json/json_writer.cpp
+++ b/src/lib_json/json_writer.cpp
@@ -63,6 +63,11 @@ std::string valueToString(UInt value) {
 #endif // # if defined(JSON_HAS_INT64)
 
 std::string valueToString(double value) {
+#if defined(WINCE)
+  char buffer[32];
+  _snprintf(buffer, sizeof(buffer), "%.16g", value);
+  return buffer;
+#else
   // We need not request the alternative representation
   // that always has a decimal point because JSON doesn't distingish the
   // concepts of reals and integers.
@@ -72,6 +77,7 @@ std::string valueToString(double value) {
   str.precision(16);
   str << value;
   return str.str();
+#endif
 }
 
 std::string valueToString(bool value) { return value ? "true" : "false"; }