diff --git a/src/video/uikit/jumphack.c b/src/video/uikit/jumphack.c
index 103c4e97a..982ddda3e 100644
--- a/src/video/uikit/jumphack.c
+++ b/src/video/uikit/jumphack.c
@@ -13,7 +13,7 @@ jmp_buf env;
 
 /* returns the jump environment for setting / getting purposes */
 jmp_buf *
-jump_env()
+jump_env(void)
 {
     return &env;
 }
diff --git a/src/video/uikit/jumphack.h b/src/video/uikit/jumphack.h
index d2b7ceb0d..b517e6355 100644
--- a/src/video/uikit/jumphack.h
+++ b/src/video/uikit/jumphack.h
@@ -11,6 +11,6 @@
 
 /* see SDL_uikitevents.m for more info */
 
-extern jmp_buf *jump_env();
+extern jmp_buf *jump_env(void);
 
 #endif