4 files changed, 12 insertions, 3 deletions
diff --git a/src/mouse/inc/mouse.h b/src/mouse/inc/mouse.h
index 60b63d3..55d0227 100644
--- a/src/mouse/inc/mouse.h
+++ b/src/mouse/inc/mouse.h
@@ -22,6 +22,7 @@ struct mouse
 
 void mouse_init(struct mouse *m);
 void mouse_update(struct mouse *m);
+bool mouse_available(void);
 bool mouse_pressed(const struct mouse *m, enum mouse_button b);
 bool mouse_justpressed(const struct mouse *m, enum mouse_button b);
 bool mouse_justreleased(const struct mouse *m, enum mouse_button b);
diff --git a/src/mouse/ps1/src/mouse.c b/src/mouse/ps1/src/mouse.c
index 78ea425..865d4c1 100644
--- a/src/mouse/ps1/src/mouse.c
+++ b/src/mouse/ps1/src/mouse.c
@@ -1,9 +1,11 @@
 #include <mouse.h>
+#include <stdbool.h>
 
 void mouse_update(struct mouse *const m)
 {
 }
 
-void mouse_init(struct mouse *const m)
+bool mouse_available(void)
 {
+    return false;
 }
diff --git a/src/mouse/sdl-1.2/src/mouse.c b/src/mouse/sdl-1.2/src/mouse.c
index 56b22f3..35fc030 100644
--- a/src/mouse/sdl-1.2/src/mouse.c
+++ b/src/mouse/sdl-1.2/src/mouse.c
@@ -85,7 +85,8 @@ end:
     }
 }
 
-void mouse_init(struct mouse *const m)
+bool mouse_available(void)
 {
-    *m = (const struct mouse){0};
+    /* Mouse availability is always assumed in SDL. */
+    return true;
 }
diff --git a/src/mouse/src/mouse.c b/src/mouse/src/mouse.c
index bec978d..b0fab77 100644
--- a/src/mouse/src/mouse.c
+++ b/src/mouse/src/mouse.c
@@ -17,3 +17,8 @@ bool mouse_justreleased(const struct mouse *const m,
 {
     return !(m->mask & (1 << b)) && m->oldmask & (1 << b);
 }
+
+void mouse_init(struct mouse *const m)
+{
+    *m = (const struct mouse){0};
+}