Index: galerautils/src/gu_system.h
--- galerautils/src/gu_system.h.orig
+++ galerautils/src/gu_system.h
@@ -23,7 +23,7 @@ extern "C" {
 
 #if defined(__sun__)
 # define GU_SYS_PROGRAM_NAME getexecname ()
-#elif defined(__APPLE__) || defined(__FreeBSD__)
+#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__)
 # define GU_SYS_PROGRAM_NAME getprogname ()
 #elif defined(__linux__)
 # define GU_SYS_PROGRAM_NAME program_invocation_name