diff --git a/asylum/file.c b/asylum/file.c

index 48e1346..9ceaacc 100644

--- a/asylum/file.c

+++ b/asylum/file.c

@@ -347,6 +347,9 @@ int swi_osfile(int op, const char* name, char* start, char* end)

         fclose(f);

         return 0;

     }

+

+    // should never be reached, value isn't important

+    return 0;

 }

 int swi_blitz_hammerop(int op, char* name, char* path, char* space)

diff --git a/asylum/keyboard.c b/asylum/keyboard.c

index 2bf8922..f307565 100644

--- a/asylum/keyboard.c

+++ b/asylum/keyboard.c

@@ -88,7 +88,7 @@ char swi_oscrc(int w, char* start, char* end, int bytes)

 int swi_joystick_read(int a, int* x, int* y)

 {

-    ;

+    return 0;

 }

 void update_keyboard()

diff --git a/asylum/sound.c b/asylum/sound.c

index 90302c8..785b342 100644

--- a/asylum/sound.c

+++ b/asylum/sound.c

@@ -393,7 +393,7 @@ void swi_sound_control(int c, int a, int p, int d)

 }

 int swi_sound_speaker(int s)

 {

-    ;

+    return 0;

 }

 void swi_stasis_link(int a, int b)

 {