Index: libc/src/uchar/c16rtomb.cpp
===================================================================
--- libc/src/uchar/c16rtomb.cpp
+++ libc/src/uchar/c16rtomb.cpp
@@ -20,21 +20,21 @@
     c16 = 0xFFFD; // Invalid Replacement Character
   }
 
-  if (C16 <= 0x7F) {
+  if (c16 <= 0x7F) {
     StringSize = 1;
     s = new char(StringSize);
-    s[0] = C16 & 0x7F;
-  } else if (C16 <= 0x7FF) {
+    s[0] = c16 & 0x7F;
+  } else if (c16 <= 0x7FF) {
     StringSize = 2;
     s = new char(StringSize);
-    s[0] = 0xC0 | (C16 & ((0x1F << 6) >> 6));
-    s[1] = 0x80 | (C16 & 0x3F);
-  } else if (C16 <= 0xFFFF) {
+    s[0] = 0xC0 | (c16 & ((0x1F << 6) >> 6));
+    s[1] = 0x80 | (c16 & 0x3F);
+  } else if (c16 <= 0xFFFF) {
     StringSize = 3;
     s = new char(StringSize);
-    s[0] = 0xE0 | (C16 & ((0x0F << 12) >> 12));
-    s[1] = 0x80 | (C16 & ((0x3F << 6) >> 6));
-    s[2] = 0x80 | (C16 & 0x3F);
+    s[0] = 0xE0 | (c16 & ((0x0F << 12) >> 12));
+    s[1] = 0x80 | (c16 & ((0x3F << 6) >> 6));
+    s[2] = 0x80 | (c16 & 0x3F);
   }
   return StringSize;
 }