diff --git a/services/audioflinger/FastMixer.h b/services/audioflinger/FastMixer.h
index 06e76d5..462739b 100644
--- a/services/audioflinger/FastMixer.h
+++ b/services/audioflinger/FastMixer.h
@@ -116,8 +116,10 @@
     // The elements in the *Ns arrays are in units of nanoseconds <= 3999999999.
     uint32_t mMonotonicNs[kSamplingN];  // delta monotonic (wall clock) time
     uint32_t mLoadNs[kSamplingN];       // delta CPU load in time
+#ifdef CPU_FREQUENCY_STATISTICS
     uint32_t mCpukHz[kSamplingN];       // absolute CPU clock frequency in kHz, bits 0-3 are CPU#
 #endif
+#endif
 };
 
 }   // namespace android