diff --git a/dlls/winecoreaudio.drv/coreaudio.c b/dlls/winecoreaudio.drv/coreaudio.c
index 56a4fd3..0690afd 100644
--- a/dlls/winecoreaudio.drv/coreaudio.c
+++ b/dlls/winecoreaudio.drv/coreaudio.c
@@ -42,10 +42,13 @@ WINE_DEFAULT_DEBUG_CHANNEL(coreaudio);
 static LRESULT CoreAudio_drvLoad(void)
 {
     TRACE("()\n");
-    CoreAudio_WaveInit();
-    CoreAudio_MIDIInit();
-    CoreAudio_MixerInit();
-    return 1;
+
+    if (CoreAudio_WaveInit() != DRV_SUCCESS ||
+        CoreAudio_MIDIInit() != DRV_SUCCESS ||
+        CoreAudio_MixerInit() != DRV_SUCCESS)
+        return DRV_FAILURE;
+
+    return DRV_SUCCESS;
 }
 
 /**************************************************************************
@@ -57,7 +60,7 @@ static LRESULT CoreAudio_drvFree(void)
     CoreAudio_WaveRelease();
     CoreAudio_MIDIRelease();
     CoreAudio_MixerRelease();
-    return 1;
+    return DRV_SUCCESS;
 }
 
 /**************************************************************************
diff --git a/dlls/winecoreaudio.drv/midi.c b/dlls/winecoreaudio.drv/midi.c
index 01eb453..a052e05 100644
--- a/dlls/winecoreaudio.drv/midi.c
+++ b/dlls/winecoreaudio.drv/midi.c
@@ -109,7 +109,7 @@ LONG CoreAudio_MIDIInit(void)
     {
         CFRelease(name);
         ERR("can't create wineMIDIClient\n");
-        return 0;
+        return DRV_FAILURE;
     }
     CFRelease(name);
 
@@ -193,7 +193,7 @@ LONG CoreAudio_MIDIInit(void)
         destinations[i].caps.wVoices = 16;
         destinations[i].caps.wNotes = 16;
     }
-    return 1;
+    return DRV_SUCCESS;
 }
 
 LONG CoreAudio_MIDIRelease(void)
@@ -214,7 +214,7 @@ LONG CoreAudio_MIDIRelease(void)
 
     HeapFree(GetProcessHeap(), 0, sources);
     HeapFree(GetProcessHeap(), 0, destinations);
-    return 1;
+    return DRV_SUCCESS;
 }
 
 
diff --git a/dlls/winecoreaudio.drv/mixer.c b/dlls/winecoreaudio.drv/mixer.c
index 66db8cb..a41b29b 100644
--- a/dlls/winecoreaudio.drv/mixer.c
+++ b/dlls/winecoreaudio.drv/mixer.c
@@ -368,7 +368,7 @@ LONG CoreAudio_MixerInit(void)
             (char) (status >> 16),
             (char) (status >> 8),
             (char) status);
-        return 0;
+        return DRV_FAILURE;
     }
 
     numLines = propertySize / sizeof(AudioDeviceID);
@@ -495,7 +495,7 @@ LONG CoreAudio_MixerInit(void)
     MIX_FillControls();
 
     HeapFree(GetProcessHeap(), 0, deviceArray);
-    return 1;
+    return DRV_SUCCESS;
 
 error:
     if (mixer.lines)
@@ -510,7 +510,7 @@ error:
     HeapFree(GetProcessHeap(), 0, deviceArray);
     if (mixer.mixerCtrls)
         HeapFree(GetProcessHeap(), 0, mixer.mixerCtrls);
-    return 0;
+    return DRV_FAILURE;
 }
 
 /**************************************************************************