diff --git a/clang/lib/Lex/InitHeaderSearch.cpp b/clang/lib/Lex/InitHeaderSearch.cpp
index 2233c9fa114bc9..86c6768d0d9fac 100644
--- a/clang/lib/Lex/InitHeaderSearch.cpp
+++ b/clang/lib/Lex/InitHeaderSearch.cpp
@@ -372,7 +372,7 @@ void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
     AddPath(BaseSDKPath + "/target/include", System, false);
     if (triple.isPS4())
       AddPath(BaseSDKPath + "/target/include_common", System, false);
-    LLVM_FALLTHROUGH;
+    break;
   }
   default:
     AddPath("/usr/include", ExternCSystem, false);
diff --git a/clang/test/Driver/ps4-header-search.c b/clang/test/Driver/ps4-header-search.c
index 3afef698d26422..20aaa5f97a749c 100644
--- a/clang/test/Driver/ps4-header-search.c
+++ b/clang/test/Driver/ps4-header-search.c
@@ -3,8 +3,10 @@
 // RUN: env SCE_ORBIS_SDK_DIR=%S/Inputs/scei-ps4_tree %clang -target x86_64-scei-ps4 -E -v %s 2>&1 | FileCheck %s --check-prefix=ENVPS4
 // ENVPS4: Inputs/scei-ps4_tree/target/include{{$}}
 // ENVPS4: Inputs/scei-ps4_tree/target/include_common{{$}}
+// ENVPS4-NOT: /usr/include
 
 // RUN: %clang -isysroot %S/Inputs/scei-ps4_tree -target x86_64-scei-ps4 -E -v %s 2>&1 | FileCheck %s --check-prefix=SYSROOTPS4
 // SYSROOTPS4: "{{[^"]*}}clang{{[^"]*}}"
 // SYSROOTPS4: Inputs/scei-ps4_tree/target/include{{$}}
 // SYSROOTPS4: Inputs/scei-ps4_tree/target/include_common{{$}}
+// SYSROOTPS4-NOT: /usr/include