diff --git a/newlib/libc/sys/rtems/include/sys/cpuset.h b/newlib/libc/sys/rtems/include/sys/cpuset.h
index 7779f0639..e46090b8a 100644
--- a/newlib/libc/sys/rtems/include/sys/cpuset.h
+++ b/newlib/libc/sys/rtems/include/sys/cpuset.h
@@ -205,7 +205,7 @@ static __inline int CPU_COUNT(const cpu_set_t *set)
 static __inline int CPU_EQUAL_S(size_t setsize, const cpu_set_t *set1,
   const cpu_set_t *set2)
 {
-  return !BIT_CMP(_cpu_set_bits(setsize), set1, set2);
+  return BIT_CMP(_cpu_set_bits(setsize), set1, set2) == 0;
 }
 
 static __inline int CPU_EQUAL(const cpu_set_t *set1, const cpu_set_t *set2)