diff --git a/checkin_notes b/checkin_notes
index 9b81ee6423..61146fec62 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -1618,3 +1618,9 @@ David  16 Feb 2009
         coproc.cpp,h
     win_build/
         libboinc.vcproj
+
+Charlie 13 Feb 2009
+    - client: fix compile break on Mac.
+
+    lib/
+        coproc.cpp
diff --git a/lib/coproc.cpp b/lib/coproc.cpp
index 9b58d074d9..6aa061683f 100644
--- a/lib/coproc.cpp
+++ b/lib/coproc.cpp
@@ -155,18 +155,18 @@ string COPROC_CUDA::get(COPROCS& coprocs) {
         return "Library doesn't have cudaGetDeviceProperties()";
     }
 
-    NvAPI_Status nvapiStatus;
-    NvDisplayHandle hDisplay;
-    NV_DISPLAY_DRIVER_VERSION Version;
-    memset(&Version, 0, sizeof(Version));
-    Version.version = NV_DISPLAY_DRIVER_VERSION_VER;
-
-    NvAPI_Initialize();
-    for (int i=0; ; i++) {
-        nvapiStatus = NvAPI_EnumNvidiaDisplayHandle(i, &hDisplay);
-        if (nvapiStatus != NVAPI_OK) break;
-        nvapiStatus = NvAPI_GetDisplayDriverVersion(hDisplay, &Version);
-        if (nvapiStatus == NVAPI_OK) break;
+    NvAPI_Status nvapiStatus;
+    NvDisplayHandle hDisplay;
+    NV_DISPLAY_DRIVER_VERSION Version;
+    memset(&Version, 0, sizeof(Version));
+    Version.version = NV_DISPLAY_DRIVER_VERSION_VER;
+
+    NvAPI_Initialize();
+    for (int i=0; ; i++) {
+        nvapiStatus = NvAPI_EnumNvidiaDisplayHandle(i, &hDisplay);
+        if (nvapiStatus != NVAPI_OK) break;
+        nvapiStatus = NvAPI_GetDisplayDriverVersion(hDisplay, &Version);
+        if (nvapiStatus == NVAPI_OK) break;
     }
 
 #else
@@ -208,7 +208,11 @@ string COPROC_CUDA::get(COPROCS& coprocs) {
         (*__cudaGetDeviceProperties)(&cc.prop, i);
         if (cc.prop.major <= 0) continue;  // major == 0 means emulation
         if (cc.prop.major > 100) continue;  // e.g. 9999 is an error
+#ifdef _WIN32
         cc.drvVersion = Version.drvVersion;
+#else
+        cc.drvVersion = 0;
+#endif
 		cc.description(buf);
 
         if (real_count) {