diff --git a/src/io/github/sspanak/tt9/ime/modes/ModePredictive.java b/src/io/github/sspanak/tt9/ime/modes/ModePredictive.java
index 095e27af..579bf463 100644
--- a/src/io/github/sspanak/tt9/ime/modes/ModePredictive.java
+++ b/src/io/github/sspanak/tt9/ime/modes/ModePredictive.java
@@ -130,6 +130,10 @@ public class ModePredictive extends InputMode {
 	 */
 	@Override
 	public boolean clearWordStem() {
+		if (stem.length() == 0) {
+			return false;
+		}
+
 		stem = "";
 		Logger.d("tt9/setWordStem", "Stem filter cleared");