diff --git a/src/Net.cc b/src/Net.cc
index 89b19ed0fb..d6cb6632b2 100644
--- a/src/Net.cc
+++ b/src/Net.cc
@@ -421,7 +421,7 @@ void net_get_final_stats()
 			{
 			iosource::PktSrc::Stats s;
 			ps->Statistics(&s);
-			reporter->Info("%u packets received on interface %s, %u dropped",
+			reporter->Info("%" PRIu64 " packets received on interface %s, %" PRIu64 " dropped",
 					s.received, ps->Path().c_str(), s.dropped);
 			}
 		}
diff --git a/src/iosource/PktSrc.h b/src/iosource/PktSrc.h
index dcf5f38de8..7efecfb0bf 100644
--- a/src/iosource/PktSrc.h
+++ b/src/iosource/PktSrc.h
@@ -28,18 +28,18 @@ public:
 		/**
 		 * Packets received by source after filtering (w/o drops).
 		 */
-		unsigned int received;
+		uint64 received;
 
 		/**
 		 * Packets dropped by source.
 		 */
-		unsigned int dropped;	// pkts dropped
+		uint64 dropped;	// pkts dropped
 
 		/**
 		 * Total number of packets on link before filtering.
 		 * Optional, can be left unset if not available.
 		 */
-		unsigned int link;
+		uint64 link;
 
 		/**
 		  * Bytes received by source after filtering (w/o drops).