diff --git a/src/config.h b/src/config.h
index 2ff920a2a..a899ba8b9 100644
--- a/src/config.h
+++ b/src/config.h
@@ -115,7 +115,12 @@
 #define HAVE_PIPE2 1
 #endif
 
-#if (defined(__APPLE__) && defined(MAC_OS_10_6_DETECTED)) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined (__NetBSD__)
+/* Detect for kqueue */
+#if (defined(__APPLE__) && defined(MAC_OS_10_6_DETECTED)) || \
+    defined(__DragonFly__) || \
+    defined(__FreeBSD__) || \
+    defined(__OpenBSD__) || \
+    defined (__NetBSD__)
 #define HAVE_KQUEUE 1
 #endif