diff --git a/src/setopt.hpp b/src/setopt.hpp
index bbd5104..7fa186a 100644
--- a/src/setopt.hpp
+++ b/src/setopt.hpp
@@ -23,6 +23,11 @@ enum {
 	SETOPTUNKNOWNOPT
 };
 
+// Define getopt stuff if it wasnt already
+//  NOTE: this could result in a symbol redefinition error
+//         if someone were to include this header only library
+//         before linked ones for some reason.
+#ifndef _GETOPT_H
 struct option {
     const char *name;
     int         has_arg;
@@ -35,6 +40,7 @@ enum {
    required_argument = 1,
    optional_argument = 2
 };
+#endif /* getopt.h */
 
 int optc, optred, opterrno = 0;