diff --git a/util/msrtool/sys.c b/util/msrtool/sys.c
index 95539c8..cc2cc4e 100644
--- a/util/msrtool/sys.c
+++ b/util/msrtool/sys.c
@@ -17,6 +17,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <pci/pci.h>
+
 #include "msrtool.h"
 
 static struct cpuid_t id;
@@ -40,3 +42,18 @@
 	}
 	return &id;
 }
+
+struct pci_dev *pci_dev_find(uint16_t vendor, uint16_t device) {
+	struct pci_dev *temp;
+	struct pci_filter filter;
+
+	pci_filter_init(NULL, &filter);
+	filter.vendor = vendor;
+	filter.device = device;
+
+	for (temp = pacc->devices; temp; temp = temp->next)
+		if (pci_filter_match(&filter, temp))
+			return temp;
+
+	return NULL;
+}