diff --git a/stepmania/src/crypto51/config.h b/stepmania/src/crypto51/config.h
index 093ed63dfc..dc6fb85952 100644
--- a/stepmania/src/crypto51/config.h
+++ b/stepmania/src/crypto51/config.h
@@ -204,7 +204,7 @@ union dword_union
 #define CRYPTOPP_WIN32_AVAILABLE
 #endif
 
-#if defined(__unix__) || defined(__MACH__)
+#if defined(__unix__) || defined(__MACH__) || defined(__NetBSD__)
 #define CRYPTOPP_UNIX_AVAILABLE
 #endif