diff --git a/app/src/main/java/com/limelight/Game.java b/app/src/main/java/com/limelight/Game.java
index 5d214508a3..292369c1d6 100644
--- a/app/src/main/java/com/limelight/Game.java
+++ b/app/src/main/java/com/limelight/Game.java
@@ -1293,6 +1293,18 @@ private byte getModifierState(KeyEvent event) {
         if (event.isMetaPressed()) {
             modifier |= KeyboardPacket.MODIFIER_META;
         }
+        return applyKeySpecificModifiers(event.getKeyCode(), modifier);
+    }
+
+    private byte getModifierState(int keyCode) {
+        return applyKeySpecificModifiers(keyCode, getModifierState());
+    }
+
+    private byte applyKeySpecificModifiers(int keyCode, byte modifier) {
+        if (keyCode == KeyEvent.KEYCODE_PLUS) {
+            // The host protocol has a single US =/+ virtual key, so Android's semantic plus key needs Shift.
+            modifier |= KeyboardPacket.MODIFIER_SHIFT;
+        }
         return modifier;
     }
 
@@ -2612,10 +2624,10 @@ public void keyboardEvent(boolean buttonDown, short keyCode) {
             }
 
             if (buttonDown) {
-                conn.sendKeyboardInput(keyMap, KeyboardPacket.KEY_DOWN, getModifierState(), (byte)0);
+                conn.sendKeyboardInput(keyMap, KeyboardPacket.KEY_DOWN, getModifierState(keyCode), (byte)0);
             }
             else {
-                conn.sendKeyboardInput(keyMap, KeyboardPacket.KEY_UP, getModifierState(), (byte)0);
+                conn.sendKeyboardInput(keyMap, KeyboardPacket.KEY_UP, getModifierState(keyCode), (byte)0);
             }
         }
     }