diff --git a/cpukit/score/cpu/arm/rtems/score/cpu.h b/cpukit/score/cpu/arm/rtems/score/cpu.h
index df946798f7..0a9ca26240 100644
--- a/cpukit/score/cpu/arm/rtems/score/cpu.h
+++ b/cpukit/score/cpu/arm/rtems/score/cpu.h
@@ -427,7 +427,7 @@ RTEMS_INLINE_ROUTINE bool _CPU_ISR_Is_enabled( uint32_t level )
 #if defined(ARM_MULTILIB_ARCH_V4)
   return ( level & 0x80 ) == 0;
 #elif defined(ARM_MULTILIB_ARCH_V7M)
-  return level > 0x80;
+  return level == 0;
 #endif
 }