diff --git a/lib/StaticAnalyzer/Checkers/CheckSecuritySyntaxOnly.cpp b/lib/StaticAnalyzer/Checkers/CheckSecuritySyntaxOnly.cpp
index b30e985..b3a234f 100644
--- a/lib/StaticAnalyzer/Checkers/CheckSecuritySyntaxOnly.cpp
+++ b/lib/StaticAnalyzer/Checkers/CheckSecuritySyntaxOnly.cpp
@@ -23,7 +23,10 @@
 static bool isArc4RandomAvailable(const ASTContext &Ctx) {
   const llvm::Triple &T = Ctx.Target.getTriple();
   return T.getVendor() == llvm::Triple::Apple ||
-         T.getOS() == llvm::Triple::FreeBSD;
+         T.getOS() == llvm::Triple::FreeBSD ||
+         T.getOS() == llvm::Triple::NetBSD ||
+         T.getOS() == llvm::Triple::OpenBSD ||
+         T.getOS() == llvm::Triple::DragonFly;
 }
 
 namespace {