diff --git a/include/ghostty.h b/include/ghostty.h
index cef635867..2e5a01eef 100644
--- a/include/ghostty.h
+++ b/include/ghostty.h
@@ -221,6 +221,7 @@ typedef enum {
     GHOSTTY_KEY_PERIOD,
     GHOSTTY_KEY_SLASH,
     GHOSTTY_KEY_MINUS,
+    GHOSTTY_KEY_PLUS,
     GHOSTTY_KEY_EQUAL,
     GHOSTTY_KEY_LEFT_BRACKET, // [
     GHOSTTY_KEY_RIGHT_BRACKET, // ]
diff --git a/src/input/key.zig b/src/input/key.zig
index 159871847..3f75e7e6e 100644
--- a/src/input/key.zig
+++ b/src/input/key.zig
@@ -281,6 +281,7 @@ pub const Key = enum(c_int) {
     period,
     slash,
     minus,
+    plus,
     equal,
     left_bracket, // [
     right_bracket, // ]
@@ -612,6 +613,9 @@ pub const Key = enum(c_int) {
             .f23,
             .f24,
             .f25,
+
+            // These keys aren't represented in cimgui
+            .plus,
             => null,
         };
     }
@@ -692,6 +696,7 @@ pub const Key = enum(c_int) {
         .{ '.', .period },
         .{ '/', .slash },
         .{ '-', .minus },
+        .{ '+', .plus },
         .{ '=', .equal },
         .{ '[', .left_bracket },
         .{ ']', .right_bracket },