diff --git a/rostests/apitests/kernel32/SetUnhandledExceptionFilter.c b/rostests/apitests/kernel32/SetUnhandledExceptionFilter.c
index 45cbe378373..97f09b2fafd 100644
--- a/rostests/apitests/kernel32/SetUnhandledExceptionFilter.c
+++ b/rostests/apitests/kernel32/SetUnhandledExceptionFilter.c
@@ -14,8 +14,8 @@
  * Keep these returning different values, to prevent compiler folding
  * them into a single function, thereby voiding the test
  */
-WINAPI LONG Filter1(LPEXCEPTION_POINTERS p) { return 0; }
-WINAPI LONG Filter2(LPEXCEPTION_POINTERS p) { return 1; }
+LONG WINAPI Filter1(LPEXCEPTION_POINTERS p) { return 0; }
+LONG WINAPI Filter2(LPEXCEPTION_POINTERS p) { return 1; }
 
 
 /*