diff --git a/extensions/cpp/syntaxes/c.json b/extensions/cpp/syntaxes/c.json
index d02d09bdaeb..d5143bd4901 100644
--- a/extensions/cpp/syntaxes/c.json
+++ b/extensions/cpp/syntaxes/c.json
@@ -4,7 +4,7 @@
 		"If you want to provide a fix or improvement, please create a pull request against the original repository.",
 		"Once accepted there, we are happy to receive an update request."
 	],
-	"version": "https://github.com/atom/language-c/commit/0a57fd7ee32bd14e3ee8291434263d744a8ecf1e",
+	"version": "https://github.com/atom/language-c/commit/9c0c5f202741a5647025db8d5df5fefba47b036c",
 	"scopeName": "source.c",
 	"fileTypes": [
 		"c",
diff --git a/extensions/cpp/test/colorize-fixtures/test-23850.cpp b/extensions/cpp/test/colorize-fixtures/test-23850.cpp
new file mode 100644
index 00000000000..00e503a204c
--- /dev/null
+++ b/extensions/cpp/test/colorize-fixtures/test-23850.cpp
@@ -0,0 +1,3 @@
+#ifndef _UCRT
+#define _UCRT
+#endif
\ No newline at end of file
diff --git a/extensions/cpp/test/colorize-results/test-23850_cpp.json b/extensions/cpp/test/colorize-results/test-23850_cpp.json
new file mode 100644
index 00000000000..bbb5237498f
--- /dev/null
+++ b/extensions/cpp/test/colorize-results/test-23850_cpp.json
@@ -0,0 +1,112 @@
+[
+	{
+		"c": "#",
+		"t": "source.cpp meta.preprocessor.c keyword.control.directive.conditional.c punctuation.definition.directive.c",
+		"r": {
+			"dark_plus": "keyword.control: #C586C0",
+			"light_plus": "keyword.control: #AF00DB",
+			"dark_vs": "keyword.control: #569CD6",
+			"light_vs": "keyword.control: #0000FF",
+			"hc_black": "keyword.control: #C586C0"
+		}
+	},
+	{
+		"c": "ifndef",
+		"t": "source.cpp meta.preprocessor.c keyword.control.directive.conditional.c",
+		"r": {
+			"dark_plus": "keyword.control: #C586C0",
+			"light_plus": "keyword.control: #AF00DB",
+			"dark_vs": "keyword.control: #569CD6",
+			"light_vs": "keyword.control: #0000FF",
+			"hc_black": "keyword.control: #C586C0"
+		}
+	},
+	{
+		"c": " ",
+		"t": "source.cpp meta.preprocessor.c",
+		"r": {
+			"dark_plus": "meta.preprocessor: #569CD6",
+			"light_plus": "meta.preprocessor: #0000FF",
+			"dark_vs": "meta.preprocessor: #569CD6",
+			"light_vs": "meta.preprocessor: #0000FF",
+			"hc_black": "meta.preprocessor: #569CD6"
+		}
+	},
+	{
+		"c": "_UCRT",
+		"t": "source.cpp meta.preprocessor.c entity.name.function.preprocessor.c",
+		"r": {
+			"dark_plus": "entity.name.function: #DCDCAA",
+			"light_plus": "entity.name.function: #795E26",
+			"dark_vs": "meta.preprocessor: #569CD6",
+			"light_vs": "meta.preprocessor: #0000FF",
+			"hc_black": "entity.name.function: #DCDCAA"
+		}
+	},
+	{
+		"c": "#",
+		"t": "source.cpp meta.preprocessor.macro.c keyword.control.directive.define.c punctuation.definition.directive.c",
+		"r": {
+			"dark_plus": "keyword.control: #C586C0",
+			"light_plus": "keyword.control: #AF00DB",
+			"dark_vs": "keyword.control: #569CD6",
+			"light_vs": "keyword.control: #0000FF",
+			"hc_black": "keyword.control: #C586C0"
+		}
+	},
+	{
+		"c": "define",
+		"t": "source.cpp meta.preprocessor.macro.c keyword.control.directive.define.c",
+		"r": {
+			"dark_plus": "keyword.control: #C586C0",
+			"light_plus": "keyword.control: #AF00DB",
+			"dark_vs": "keyword.control: #569CD6",
+			"light_vs": "keyword.control: #0000FF",
+			"hc_black": "keyword.control: #C586C0"
+		}
+	},
+	{
+		"c": " ",
+		"t": "source.cpp meta.preprocessor.macro.c",
+		"r": {
+			"dark_plus": "meta.preprocessor: #569CD6",
+			"light_plus": "meta.preprocessor: #0000FF",
+			"dark_vs": "meta.preprocessor: #569CD6",
+			"light_vs": "meta.preprocessor: #0000FF",
+			"hc_black": "meta.preprocessor: #569CD6"
+		}
+	},
+	{
+		"c": "_UCRT",
+		"t": "source.cpp meta.preprocessor.macro.c entity.name.function.preprocessor.c",
+		"r": {
+			"dark_plus": "entity.name.function: #DCDCAA",
+			"light_plus": "entity.name.function: #795E26",
+			"dark_vs": "meta.preprocessor: #569CD6",
+			"light_vs": "meta.preprocessor: #0000FF",
+			"hc_black": "entity.name.function: #DCDCAA"
+		}
+	},
+	{
+		"c": "#",
+		"t": "source.cpp meta.preprocessor.c keyword.control.directive.conditional.c punctuation.definition.directive.c",
+		"r": {
+			"dark_plus": "keyword.control: #C586C0",
+			"light_plus": "keyword.control: #AF00DB",
+			"dark_vs": "keyword.control: #569CD6",
+			"light_vs": "keyword.control: #0000FF",
+			"hc_black": "keyword.control: #C586C0"
+		}
+	},
+	{
+		"c": "endif",
+		"t": "source.cpp meta.preprocessor.c keyword.control.directive.conditional.c",
+		"r": {
+			"dark_plus": "keyword.control: #C586C0",
+			"light_plus": "keyword.control: #AF00DB",
+			"dark_vs": "keyword.control: #569CD6",
+			"light_vs": "keyword.control: #0000FF",
+			"hc_black": "keyword.control: #C586C0"
+		}
+	}
+]
\ No newline at end of file