diff --git a/python/test/test_novatel_types.py b/python/test/test_novatel_types.py
index ffc823766..b1b6fe3c4 100644
--- a/python/test/test_novatel_types.py
+++ b/python/test/test_novatel_types.py
@@ -152,7 +152,6 @@ def test_ASCII_UCHAR_BYTE_INVALID(helper):
     assert intermediate_format.INT_1 == 0
 
 
-@pytest.mark.xfail(reason="%c is broken")
 def test_ASCII_CHAR_VALID(helper):
     helper.create_base_field("CHAR_1", FIELD_TYPE.SIMPLE, "%c", 1, DATA_TYPE.CHAR)
     helper.create_base_field("CHAR_2", FIELD_TYPE.SIMPLE, "%c", 1, DATA_TYPE.CHAR)
@@ -167,7 +166,6 @@ def test_ASCII_CHAR_VALID(helper):
     assert intermediate_format.CHAR_3 == ord(';')
 
 
-@pytest.mark.xfail(reason="%c is broken")
 def test_ASCII_CHAR_INVALID(helper):
     helper.create_base_field("CHAR", FIELD_TYPE.SIMPLE, "%c", 2, DATA_TYPE.CHAR)
     input = b""
diff --git a/regression/targets/BESTUTMBIN.GPS.ABBREV_ASCII b/regression/targets/BESTUTMBIN.GPS.ABBREV_ASCII
index df391a966..048be2054 100644
Binary files a/regression/targets/BESTUTMBIN.GPS.ABBREV_ASCII and b/regression/targets/BESTUTMBIN.GPS.ABBREV_ASCII differ
diff --git a/regression/targets/BESTUTMBIN.GPS.ASCII b/regression/targets/BESTUTMBIN.GPS.ASCII
index 4081a22fc..3d295b877 100644
Binary files a/regression/targets/BESTUTMBIN.GPS.ASCII and b/regression/targets/BESTUTMBIN.GPS.ASCII differ
diff --git a/regression/targets/BESTUTMBIN.GPS.BINARY b/regression/targets/BESTUTMBIN.GPS.BINARY
index 3856b74a1..4d6188967 100644
Binary files a/regression/targets/BESTUTMBIN.GPS.BINARY and b/regression/targets/BESTUTMBIN.GPS.BINARY differ
diff --git a/regression/targets/BESTUTMBIN.GPS.FLATTENED_BINARY b/regression/targets/BESTUTMBIN.GPS.FLATTENED_BINARY
index 7a59573cd..850735215 100644
Binary files a/regression/targets/BESTUTMBIN.GPS.FLATTENED_BINARY and b/regression/targets/BESTUTMBIN.GPS.FLATTENED_BINARY differ
diff --git a/regression/targets/BESTUTMBIN.GPS.JSON b/regression/targets/BESTUTMBIN.GPS.JSON
index a8dca6a01..8e379b5d3 100644
Binary files a/regression/targets/BESTUTMBIN.GPS.JSON and b/regression/targets/BESTUTMBIN.GPS.JSON differ
diff --git a/src/decoders/oem/src/message_decoder.cpp b/src/decoders/oem/src/message_decoder.cpp
index 3bd13980e..db53411aa 100644
--- a/src/decoders/oem/src/message_decoder.cpp
+++ b/src/decoders/oem/src/message_decoder.cpp
@@ -44,7 +44,13 @@ void MessageDecoder::InitOemFieldMaps()
     // =========================================================
     // ASCII Field Mapping
     // =========================================================
-    asciiFieldMap[CalculateBlockCrc32("c")] = SimpleAsciiMapEntry<uint32_t>();
+    asciiFieldMap[CalculateBlockCrc32("c")] = [](std::vector<FieldContainer>& vIntermediateFormat_, BaseField::ConstPtr pstMessageDataType_,
+                                                 const char** ppcToken_, [[maybe_unused]] const size_t tokenLength_,
+                                                 [[maybe_unused]] JsonReader& pclMsgDb_) {
+        // TODO: check that the character is printable
+        // if (!isprint(**ppcToken_)) { throw ... }
+        vIntermediateFormat_.emplace_back(static_cast<uint32_t>(**ppcToken_), pstMessageDataType_);
+    };
     asciiFieldMap[CalculateBlockCrc32("k")] = SimpleAsciiMapEntry<float>();
     asciiFieldMap[CalculateBlockCrc32("lk")] = SimpleAsciiMapEntry<double>();