diff --git a/libs/backends/coreaudio/coreaudio_pcmio.cc b/libs/backends/coreaudio/coreaudio_pcmio.cc
index b2279674ea..769cf1074a 100644
--- a/libs/backends/coreaudio/coreaudio_pcmio.cc
+++ b/libs/backends/coreaudio/coreaudio_pcmio.cc
@@ -293,7 +293,7 @@ CoreAudioPCM::available_sample_rates(uint32_t device_id, std::vector<float>& sam
 		return -1;
 	}
 
-	int numRates = size / sizeof(AudioValueRange);
+	uint32_t numRates = size / sizeof(AudioValueRange);
 	AudioValueRange* supportedRates = new AudioValueRange[numRates];
 
 	err = GetPropertyWrapper (_device_ids[device_id], 0, false, kAudioDevicePropertyAvailableNominalSampleRates, &size, supportedRates);
@@ -431,7 +431,7 @@ CoreAudioPCM::get_stream_latencies(uint32_t device_id, bool input, std::vector<u
 			return;
 		}
 #ifndef NDEBUG
-		printf("  ^ Stream %d latency: %d\n", i, stream_latency);
+		printf("  ^ Stream %u latency: %u\n", (unsigned int)i, (unsigned int)stream_latency);
 #endif
 		latencies.push_back(stream_latency);
 	}
diff --git a/libs/backends/coreaudio/wscript b/libs/backends/coreaudio/wscript
index 82f892a1f2..9fcc678050 100644
--- a/libs/backends/coreaudio/wscript
+++ b/libs/backends/coreaudio/wscript
@@ -38,5 +38,5 @@ def build(bld):
     # use new coreaudio API (the old one was deprecated in 10.6, yet still works)
     # only use with OSX intel 10.6 or later, but for all OSX/PPC (<= 10.6)
     if not bld.env['build_target'] in ['panther', 'tiger', 'leopard']:
-        if not (bld.env['build_target'] == 'snow leopard' and conf.env['build_arch'] == "ppc"):
+        if not (bld.env['build_target'] == 'snowleopard' and bld.env['build_arch'] == "ppc"):
             obj.defines += ['COREAUDIO_108']