diff --git a/qbs/modules/libclang/functions.js b/qbs/modules/libclang/functions.js
index e09ebef1ee5..3027aff4ede 100644
--- a/qbs/modules/libclang/functions.js
+++ b/qbs/modules/libclang/functions.js
@@ -1,5 +1,6 @@
 var Environment = loadExtension("qbs.Environment")
 var File = loadExtension("qbs.File")
+var FileInfo = loadExtension("qbs.FileInfo")
 var MinimumLLVMVersion = "3.8.0"
 var Process = loadExtension("qbs.Process")
 
@@ -57,12 +58,12 @@ function llvmConfig(qbs, qtcFunctions)
 
 function includeDir(llvmConfig)
 {
-    return readOutput(llvmConfig, ["--includedir"])
+    return FileInfo.toNativeSeparators(readOutput(llvmConfig, ["--includedir"]));
 }
 
 function libDir(llvmConfig)
 {
-    return readOutput(llvmConfig, ["--libdir"])
+    return FileInfo.toNativeSeparators(readOutput(llvmConfig, ["--libdir"]));
 }
 
 function version(llvmConfig)
diff --git a/src/plugins/clangcodemodel/clangcodemodel.pro b/src/plugins/clangcodemodel/clangcodemodel.pro
index ff3ce0aea49..0d9b5ee96b7 100644
--- a/src/plugins/clangcodemodel/clangcodemodel.pro
+++ b/src/plugins/clangcodemodel/clangcodemodel.pro
@@ -3,7 +3,8 @@ include(../../shared/clang/clang_installation.pri)
 
 # The following defines are used to determine the clang include path for intrinsics.
 DEFINES += CLANG_VERSION=\\\"$${LLVM_VERSION}\\\"
-DEFINES += "\"CLANG_RESOURCE_DIR=\\\"$${LLVM_LIBDIR}/clang/$${LLVM_VERSION}/include\\\"\""
+CLANG_RESOURCE_DIR=$$clean_path($${LLVM_LIBDIR}/clang/$${LLVM_VERSION}/include)
+DEFINES += "\"CLANG_RESOURCE_DIR=\\\"$${CLANG_RESOURCE_DIR}\\\"\""
 
 SOURCES += \
     clangactivationsequencecontextprocessor.cpp \