diff --git a/riscos/content-handlers/artworks.h b/riscos/content-handlers/artworks.h
index 20f6168b7..67832cc54 100644
--- a/riscos/content-handlers/artworks.h
+++ b/riscos/content-handlers/artworks.h
@@ -32,7 +32,10 @@ nserror artworks_init(void);
 
 #else
 
-#define artworks_init() NSERROR_OK
+static inline nserror artworks_init(void)
+{
+	return NSERROR_OK;
+}
 
 #endif
 
diff --git a/riscos/content-handlers/draw.h b/riscos/content-handlers/draw.h
index 76fcbc8dc..9f5baf6dc 100644
--- a/riscos/content-handlers/draw.h
+++ b/riscos/content-handlers/draw.h
@@ -32,7 +32,10 @@ nserror draw_init(void);
 
 #else
 
-#define draw_init() NSERROR_OK
+static inline nserror draw_init(void)
+{
+	return NSERROR_OK;
+}
 
 #endif /* WITH_DRAW */
 
diff --git a/riscos/content-handlers/sprite.h b/riscos/content-handlers/sprite.h
index 2219e0679..ab6d312a5 100644
--- a/riscos/content-handlers/sprite.h
+++ b/riscos/content-handlers/sprite.h
@@ -32,7 +32,10 @@ nserror sprite_init(void);
 
 #else
 
-#define sprite_init() NSERROR_OK
+static inline nserror sprite_init(void)
+{
+	return NSERROR_OK;
+}
 
 #endif