diff --git a/app/src/main/java/io/github/sspanak/tt9/ui/main/keys/SoftKeyShift.java b/app/src/main/java/io/github/sspanak/tt9/ui/main/keys/SoftKeyShift.java
index e8926ff8..df0cf58f 100644
--- a/app/src/main/java/io/github/sspanak/tt9/ui/main/keys/SoftKeyShift.java
+++ b/app/src/main/java/io/github/sspanak/tt9/ui/main/keys/SoftKeyShift.java
@@ -38,6 +38,7 @@ public class SoftKeyShift extends BaseSoftKeyWithIcons {
 		resetIconCache();
 		setEnabled(
 			tt9 != null
+			&& tt9.getLanguage() != null && tt9.getLanguage().hasUpperCase()
 			&& !tt9.isVoiceInputActive()
 			&& !tt9.isInputModePhone()
 			&& !tt9.isNumericModeSigned()