diff --git a/src/dev/hsa/hsa_packet_processor.cc b/src/dev/hsa/hsa_packet_processor.cc
index cd6ef5a4b2..eeb64da4c9 100644
--- a/src/dev/hsa/hsa_packet_processor.cc
+++ b/src/dev/hsa/hsa_packet_processor.cc
@@ -133,8 +133,7 @@ HSAPacketProcessor::write(Packet *pkt)
           "%s: write of size %d to reg-offset %d (0x%x)\n",
           __FUNCTION__, pkt->getSize(), daddr, daddr);
 
-    int doorbellSize = gpu_device->driver()->doorbellSize();
-    assert(doorbellSize == pkt->getSize());
+    assert(gpu_device->driver()->doorbellSize() == pkt->getSize());
 
     uint64_t doorbell_reg(0);
     if (pkt->getSize() == 8)
diff --git a/src/gpu-compute/gpu_compute_driver.cc b/src/gpu-compute/gpu_compute_driver.cc
index 8c79be39da..ac42752503 100644
--- a/src/gpu-compute/gpu_compute_driver.cc
+++ b/src/gpu-compute/gpu_compute_driver.cc
@@ -582,7 +582,7 @@ GPUComputeDriver::ioctl(ThreadContext *tc, unsigned req, Addr ioc_buf)
 
             assert(isdGPU);
             assert((args->va_addr % TheISA::PageBytes) == 0);
-            Addr mmap_offset = 0;
+            M5_VAR_USED Addr mmap_offset = 0;
 
             Request::CacheCoherenceFlags mtype = defaultMtype;
             Addr pa_addr = 0;