diff --git a/src/tm-threads.c b/src/tm-threads.c
index 2fb9d788af..77d3e996d9 100644
--- a/src/tm-threads.c
+++ b/src/tm-threads.c
@@ -55,6 +55,7 @@
 #include <mach/thread_policy.h>
 #define cpu_set_t thread_affinity_policy_data_t
 #define CPU_SET(cpu_id, new_mask) (*(new_mask)).affinity_tag = (cpu_id + 1)
+#define CPU_ISSET(cpu_id, new_mask) ((*(new_mask)).affinity_tag == (cpu_id + 1))
 #define CPU_ZERO(new_mask) (*(new_mask)).affinity_tag = THREAD_AFFINITY_TAG_NULL
 #endif /* OS_FREEBSD */
 
diff --git a/src/util-affinity.h b/src/util-affinity.h
index 423e30240b..3edb7a3e44 100644
--- a/src/util-affinity.h
+++ b/src/util-affinity.h
@@ -37,6 +37,9 @@
 #include <mach/mach_init.h>
 #include <mach/thread_policy.h>
 #define cpu_set_t thread_affinity_policy_data_t
+#define CPU_SET(cpu_id, new_mask) (*(new_mask)).affinity_tag = (cpu_id + 1)
+#define CPU_ISSET(cpu_id, new_mask) ((*(new_mask)).affinity_tag == (cpu_id + 1))
+#define CPU_ZERO(new_mask) (*(new_mask)).affinity_tag = THREAD_AFFINITY_TAG_NULL
 #endif
 
 enum {