diff --git a/reactos/hal/halx86/mp/processor_mp.c b/reactos/hal/halx86/mp/processor_mp.c
index 069a96bb269..0627e90041e 100644
--- a/reactos/hal/halx86/mp/processor_mp.c
+++ b/reactos/hal/halx86/mp/processor_mp.c
@@ -18,7 +18,7 @@
 #define NDEBUG
 #include <debug.h>
 
-KAFFINITY HalpActiveProcessors;
+KAFFINITY HalpActiveProcessors, HalpDefaultInterruptAffinity;
  
 /* PRIVATE FUNCTIONS *********************************************************/