diff --git a/ethertype-dump.c b/ethertype-dump.c
index c7966a4..07b0b0f 100644
--- a/ethertype-dump.c
+++ b/ethertype-dump.c
@@ -118,6 +118,10 @@ int main(int argc, char **argv) {
 				err(1, "printf");
 			}
 		}
+
+		if (fflush(stdout) == -1) {
+			err(1, "fflush");
+		}
 	}
 
 	return 0;