diff --git a/source/dyaml/reader.d b/source/dyaml/reader.d
index 3cfe69a..f7607f7 100644
--- a/source/dyaml/reader.d
+++ b/source/dyaml/reader.d
@@ -926,7 +926,8 @@ bool isPrintableValidUTF8(const char[] chars) @trusted pure nothrow @nogc
         const dchar c = decodeValidUTF8NoGC(chars, index);
         // We now c is not ASCII, so only check for printable non-ASCII chars.
         if(!(c == 0x85 || (c >= 0xA0 && c <= '\uD7FF') ||
-            (c >= '\uE000' && c <= '\uFFFD')))
+            (c >= '\uE000' && c <= '\uFFFD') ||
+            (c >= '\U00010000' && c <= '\U0010FFFF')))
         {
             return false;
         }
diff --git a/test/data/bmpchars.canonical b/test/data/bmpchars.canonical
new file mode 100644
index 0000000..9b77b57
--- /dev/null
+++ b/test/data/bmpchars.canonical
@@ -0,0 +1,6 @@
+%YAML 1.1
+---
+!!map {
+  ? !!str "a"
+  : !!str "𒅗"
+}
diff --git a/test/data/bmpchars.data b/test/data/bmpchars.data
new file mode 100644
index 0000000..28e948e
--- /dev/null
+++ b/test/data/bmpchars.data
@@ -0,0 +1 @@
+a: 𒅗
\ No newline at end of file