Index: third-party/fast_double_parser/include/fast_double_parser.h
--- third-party/fast_double_parser/include/fast_double_parser.h.orig
+++ third-party/fast_double_parser/include/fast_double_parser.h
@@ -10,7 +10,7 @@
 #include <cstdlib>
 #include <cstring>
 #include <locale.h>
-#if (defined(sun) || defined(__sun)) 
+#if (defined(sun) || defined(__sun) || defined(__OpenBSD__))
 #define FAST_DOUBLE_PARSER_SOLARIS
 #endif
 
