diff --git a/src/gmastertrack.cxx b/src/gmastertrack.cxx
index b7b46ad..5e8bb94 100644
--- a/src/gmastertrack.cxx
+++ b/src/gmastertrack.cxx
@@ -170,7 +170,9 @@ static void gmastertrack_button_callback(Fl_Widget *w, void *data)
 
 	} else if ( strcmp( w->label(), "Tap" ) == 0 ) {
 		if ( Fl::event_button() == FL_RIGHT_MOUSE ) {
-			const char* answer = fl_input("Enter BPM value: ");
+			string question = "Enter BPM value (between " + to_string(MIN_TEMPO) + " and " 
+								+ to_string(MAX_TEMPO) + "):";
+			const char* answer = fl_input(question.c_str());
 			if(answer) {
 				int bpm = atoi(answer);