diff --git a/builds/cmake/platform.hpp.in b/builds/cmake/platform.hpp.in
index 03a14700..8e6fb402 100644
--- a/builds/cmake/platform.hpp.in
+++ b/builds/cmake/platform.hpp.in
@@ -75,10 +75,15 @@
   #define ZMQ_HAVE_MINGW32
 #endif
 
-#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__FreeBSD_kernel__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
   #define ZMQ_HAVE_FREEBSD
 #endif
 
+#if defined(__DragonFly__)
+  #define ZMQ_HAVE_FREEBSD
+  #define ZMQ_HAVE_DRAGONFLY
+#endif
+
 #if defined __hpux
   #define ZMQ_HAVE_HPUX
 #endif
diff --git a/configure.ac b/configure.ac
index 9b2aa640..083c9e20 100644
--- a/configure.ac
+++ b/configure.ac
@@ -233,6 +233,7 @@ case "${host_os}" in
         ;;
     *dragonfly*)
         CPPFLAGS="-D__BSD_VISIBLE $CPPFLAGS"
+        AC_DEFINE(ZMQ_HAVE_FREEBSD, 1, [Have DragonFly OS])
         AC_DEFINE(ZMQ_HAVE_DRAGONFLY, 1, [Have DragonFly OS])
         ;;
     *darwin*)