diff --git a/kernel/perf.h b/kernel/perf.h
index 4bf9bb445..8dcf53b23 100644
--- a/kernel/perf.h
+++ b/kernel/perf.h
@@ -7,6 +7,10 @@
 #define PERF_USE_COW_SAFECOPY 0
 
 /* Use a private page table for critical system processes. */
+#ifdef CONFIG_SMP
+#define PERF_SYS_CORE_FULLVM 1
+#else
 #define PERF_SYS_CORE_FULLVM 0
+#endif
 
 #endif /* PERF_H */