diff --git a/gfx/common/win32_common.cpp b/gfx/common/win32_common.cpp
index 4a31f7ba26..03fc815257 100644
--- a/gfx/common/win32_common.cpp
+++ b/gfx/common/win32_common.cpp
@@ -678,7 +678,7 @@ static HANDLE GetFocus(void)
 }
 #endif
 
-bool win32_has_focus(void *data)
+bool win32_has_focus(void)
 {
    if (!g_inited)
       return false;
diff --git a/gfx/common/win32_common.h b/gfx/common/win32_common.h
index 56dbef27b2..2c2533baa1 100644
--- a/gfx/common/win32_common.h
+++ b/gfx/common/win32_common.h
@@ -75,7 +75,7 @@ bool win32_get_metrics(void *data,
 
 void win32_show_cursor(bool state);
 
-bool win32_has_focus(void *data);
+bool win32_has_focus(void);
 
 void win32_check_window(bool *quit,
       bool *resize, unsigned *width, unsigned *height);