diff --git a/changes/3.0.0-x-next.md b/changes/3.0.0-x-next.md
new file mode 100644
index 000000000..b34d601a7
--- /dev/null
+++ b/changes/3.0.0-x-next.md
@@ -0,0 +1 @@
+ * Fix missing mapping regression of U+1D0D (#510).
\ No newline at end of file
diff --git a/glyphs/letters-unified-basic.ptl b/glyphs/letters-unified-basic.ptl
index dee3e373a..39a769d94 100644
--- a/glyphs/letters-unified-basic.ptl
+++ b/glyphs/letters-unified-basic.ptl
@@ -3595,7 +3595,7 @@ glyph-block LetterUnified-Basic : begin
 			set-width df.width
 			include : MShape XH df.div
 			save 'cyrem' 0x43C
-			save 'smcpM'
+			save 'smcpM' 0x1D0D
 
 	### m
 	do "m and related ============================================================================"