diff --git a/firmware/apps/ducklings.c b/firmware/apps/ducklings.c
index cf6f1c2..4059009 100644
--- a/firmware/apps/ducklings.c
+++ b/firmware/apps/ducklings.c
@@ -1,7 +1,5 @@
 #include <stdlib.h>
 
-#include <avr/pgmspace.h>
-
 #include <pentabug/music.h>
 #include <pentabug/hal.h>
 #include <pentabug/helper.h>
@@ -9,7 +7,7 @@
 
 #define NOTE_BREAK		MLDY_LENGTH, 16, NOTE_PAUSE
 
-static const uint16_t notes[] PROGMEM = {
+static uint16_t notes[] = {
 	NOTE_C, NOTE_D, NOTE_E, NOTE_F, MLDY_LENGTH, 2, NOTE_G, MLDY_LENGTH, 2, NOTE_G, NOTE_BREAK,
 	NOTE_A, NOTE_A, NOTE_A, NOTE_A, MLDY_LENGTH, 2, NOTE_G, NOTE_BREAK,
 	NOTE_A, NOTE_A, NOTE_A, NOTE_A, MLDY_LENGTH, 2, NOTE_G, NOTE_BREAK,
diff --git a/firmware/include/pentabug/music.h b/firmware/include/pentabug/music.h
index 6404b0e..7937412 100644
--- a/firmware/include/pentabug/music.h
+++ b/firmware/include/pentabug/music.h
@@ -25,7 +25,7 @@
 void set_note(uint16_t note, uint8_t octave);
 
 // plays a melody consisting of the array of tunes of length len with speed ms for each tune
-void play_melody(const uint16_t melody[], size_t len, uint8_t octave, int speed);
+void play_melody(uint16_t melody[], size_t len, uint8_t octave, int speed);
 
 // stop the currently playing note
 void stop_note(void);
diff --git a/firmware/lib/music.c b/firmware/lib/music.c
index 4e0b3b4..1d5b7fa 100644
--- a/firmware/lib/music.c
+++ b/firmware/lib/music.c
@@ -29,7 +29,7 @@ void stop_note(void) {
 	stop_timer();
 }
 
-void play_melody(const uint16_t notes[], size_t len, uint8_t octave, int speed) {
+void play_melody(uint16_t notes[], size_t len, uint8_t octave, int speed) {
 	int pause = speed / 20;
 	uint8_t length = 4;
 
diff --git a/firmware/main.c b/firmware/main.c
index d79d760..2ceac37 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -2,16 +2,14 @@
 #include <stdint.h>
 #include <stdlib.h>
 
-#include <avr/pgmspace.h>
-
 #include <pentabug/hal.h>
 #include <pentabug/app.h>
 #include <pentabug/lifecycle.h>
 #include <pentabug/music.h>
 #include <pentabug/helper.h>
 
-static const uint16_t up_mldy[] PROGMEM = { NOTE_C, NOTE_D, MLDY_LENGTH, 2, NOTE_F, NOTE_PAUSE };
-static const uint16_t down_mldy[] PROGMEM = { NOTE_F, NOTE_E, MLDY_LENGTH, 2, NOTE_C, NOTE_PAUSE };
+static uint16_t up_mldy[] = { NOTE_C, NOTE_D, MLDY_LENGTH, 2, NOTE_F, NOTE_PAUSE };
+static uint16_t down_mldy[] = { NOTE_F, NOTE_E, MLDY_LENGTH, 2, NOTE_C, NOTE_PAUSE };
 
 static inline void run_app(struct app_t* app) {
 	app_should_stop = 0;