diff --git a/src/cares_wrap.cc b/src/cares_wrap.cc
index 11206b16dd8e41..dbbdbc08380a7a 100644
--- a/src/cares_wrap.cc
+++ b/src/cares_wrap.cc
@@ -38,6 +38,19 @@
 #include <vector>
 #include <unordered_set>
 
+#ifndef T_CAA
+# define T_CAA    257 /* Certification Authority Authorization */
+#endif
+
+// OpenBSD does not define these
+#ifndef AI_ALL
+# define AI_ALL 0
+#endif
+#ifndef AI_V4MAPPED
+# define AI_V4MAPPED 0
+#endif
+
+
 namespace node {
 namespace cares_wrap {
 
diff --git a/src/cares_wrap.h b/src/cares_wrap.h
index 20d350a76321e8..27322367556374 100644
--- a/src/cares_wrap.h
+++ b/src/cares_wrap.h
@@ -32,14 +32,6 @@
 # include <arpa/nameser.h>
 #endif
 
-#ifndef T_CAA
-#  define T_CAA    257 /* Certification Authority Authorization */
-#endif
-
-#if defined(__OpenBSD__)
-# define AI_V4MAPPED 0
-#endif
-
 namespace node {
 namespace cares_wrap {