Index: testsuite/TestSuiteUtils.cpp
--- testsuite/TestSuiteUtils.cpp.orig
+++ testsuite/TestSuiteUtils.cpp
@@ -34,7 +34,7 @@
 #include <cstdio>
 #include <cstring>
 
-#if defined (_POSIX_C_SOURCE) || defined (_POSIX_SOURCE) || defined(__APPLE__) || defined(__FreeBSD__)
+#if defined (_POSIX_C_SOURCE) || defined (_POSIX_SOURCE) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__)
 #define USE_POSIX
 #elif defined(_WIN32)
 #define USE_WIN32
