diff --git a/libguac/include/protocol.h b/libguac/include/protocol.h
index 32416a7b..70063f29 100644
--- a/libguac/include/protocol.h
+++ b/libguac/include/protocol.h
@@ -166,7 +166,7 @@ typedef enum guac_line_cap_style {
  */
 typedef enum guac_line_join_style {
     GUAC_LINE_JOIN_BEVEL = 0x0,
-    GUAC_LINE_JOIN_MITRE = 0x1,
+    GUAC_LINE_JOIN_MITER = 0x1,
     GUAC_LINE_JOIN_ROUND = 0x2
 } guac_line_join_style;