Index: lldb.xcodeproj/project.pbxproj
===================================================================
--- lldb.xcodeproj/project.pbxproj
+++ lldb.xcodeproj/project.pbxproj
@@ -7486,7 +7486,7 @@
 				LLVM_BUILD_DIR = "$(SRCROOT)/llvm-build/$(LLVM_CONFIGURATION)";
 				LLVM_BUILD_DIRTREE = "$(SRCROOT)/llvm-build";
 				LLVM_BUILD_DIR_ARCH = "$(CURRENT_ARCH)/";
-				LLVM_CONFIGURATION = "Release+Asserts";
+				LLVM_CONFIGURATION = "Debug+Asserts";
 				LLVM_SOURCE_DIR = "$(SRCROOT)/llvm";
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
 				ONLY_ACTIVE_ARCH = YES;
Index: scripts/Xcode/build-llvm.py
===================================================================
--- scripts/Xcode/build-llvm.py
+++ scripts/Xcode/build-llvm.py
@@ -106,13 +106,13 @@
 def CMAKE_FLAGS ():
     return {
         "Debug": [
-            "-DCMAKE_BUILD_TYPE=RelWithDebInfo",
-            "-DLLVM_ENABLE_ASSERTIONS=ON",
-            ],
-        "DebugClang": [
             "-DCMAKE_BUILD_TYPE=Debug",
             "-DLLVM_ENABLE_ASSERTIONS=ON",
             ],
+        "DebugClang": [
+             "-DCMAKE_BUILD_TYPE=Debug",
+             "-DLLVM_ENABLE_ASSERTIONS=ON",
+             ],
         "Release": [
             "-DCMAKE_BUILD_TYPE=Release",
             "-DLLVM_ENABLE_ASSERTIONS=ON",