diff --git a/src/plugins/script/script-repo.c b/src/plugins/script/script-repo.c
index dd9e3533e..6ea49b1f3 100644
--- a/src/plugins/script/script-repo.c
+++ b/src/plugins/script/script-repo.c
@@ -21,7 +21,13 @@
  * script-repo.c: download and read repository file (plugins.xml.gz)
  */
 
+/*
+ * this define is needed for strptime()
+ * but is not used for OpenBSD, it causes bug with gcrypt (see bug #37373)
+ */
+#if !defined(__OpenBSD__)
 #define _XOPEN_SOURCE 700
+#endif
 
 #include <limits.h>
 #include <stdlib.h>