diff --git a/lldb/source/Core/ArchSpec.cpp b/lldb/source/Core/ArchSpec.cpp
index 790c2ebb6e58..9f5e651c41f5 100644
--- a/lldb/source/Core/ArchSpec.cpp
+++ b/lldb/source/Core/ArchSpec.cpp
@@ -457,7 +457,7 @@ ArchSpec::SetTriple (const llvm::Triple &triple)
 bool
 ArchSpec::SetTriple (const char *triple_cstr, Platform *platform)
 {
-    if (triple_cstr && !triple_cstr[0])
+    if (triple_cstr && triple_cstr[0])
     {
         llvm::StringRef triple_stref (triple_cstr);
         if (triple_stref.startswith (LLDB_ARCH_DEFAULT))