diff --git a/test_common/harness/deviceInfo.cpp b/test_common/harness/deviceInfo.cpp
index 5b1e7e03..e06d32aa 100644
--- a/test_common/harness/deviceInfo.cpp
+++ b/test_common/harness/deviceInfo.cpp
@@ -50,7 +50,7 @@ std::string get_device_info_string(cl_device_id device,
 }
 
 /* Determines if an extension is supported by a device. */
-int is_extension_available(cl_device_id device, const char *extensionName)
+bool is_extension_available(cl_device_id device, const char *extensionName)
 {
     std::string extString = get_device_extensions_string(device);
     std::istringstream ss(extString);
diff --git a/test_common/harness/deviceInfo.h b/test_common/harness/deviceInfo.h
index c3c8a512..30711b18 100644
--- a/test_common/harness/deviceInfo.h
+++ b/test_common/harness/deviceInfo.h
@@ -26,7 +26,7 @@ std::string get_device_info_string(cl_device_id device,
                                    cl_device_info param_name);
 
 /* Determines if an extension is supported by a device. */
-int is_extension_available(cl_device_id device, const char *extensionName);
+bool is_extension_available(cl_device_id device, const char *extensionName);
 
 /* Returns the version of the extension the device supports or throws an
  * exception if the extension is not supported by the device. */