diff --git a/intern/cycles/device/device_cuda.cpp b/intern/cycles/device/device_cuda.cpp
index 8db915f..0fbb48c 100644
--- a/intern/cycles/device/device_cuda.cpp
+++ b/intern/cycles/device/device_cuda.cpp
@@ -355,7 +355,14 @@ public:
 		/* open module */
 		cuda_push_context();
 
-		CUresult result = cuModuleLoad(&cuModule, cubin.c_str());
+		string cubin_data;
+		CUresult result;
+
+		if (path_read_text(cubin, cubin_data))
+			result = cuModuleLoadData(&cuModule, cubin_data.c_str());
+		else
+			result = CUDA_ERROR_FILE_NOT_FOUND;
+
 		if(cuda_error_(result, "cuModuleLoad"))
 			cuda_error_message(string_printf("Failed loading CUDA kernel %s.", cubin.c_str()));
 
diff --git a/intern/cycles/util/util_cache.cpp b/intern/cycles/util/util_cache.cpp
index 35956e4..f1c9dcd 100644
--- a/intern/cycles/util/util_cache.cpp
+++ b/intern/cycles/util/util_cache.cpp
@@ -79,7 +79,7 @@ void Cache::insert(CacheData& key, CacheData& value)
 {
 	string filename = data_filename(key);
 	path_create_directories(filename);
-	FILE *f = fopen(filename.c_str(), "wb");
+	FILE *f = path_fopen(filename, "wb");
 
 	if(!f) {
 		fprintf(stderr, "Failed to open file %s for writing.\n", filename.c_str());
@@ -100,7 +100,7 @@ void Cache::insert(CacheData& key, CacheData& value)
 bool Cache::lookup(CacheData& key, CacheData& value)
 {
 	string filename = data_filename(key);
-	FILE *f = fopen(filename.c_str(), "rb");
+	FILE *f = path_fopen(filename, "rb");
 
 	if(!f)
 		return false;
diff --git a/intern/cycles/util/util_md5.cpp b/intern/cycles/util/util_md5.cpp
index 9dcd69c..c53fbd9 100644
--- a/intern/cycles/util/util_md5.cpp
+++ b/intern/cycles/util/util_md5.cpp
@@ -24,6 +24,7 @@
 /* Minor modifications done to remove some code and change style. */
 
 #include "util_md5.h"
+#include "util_path.h"
 
 #include <string.h>
 #include <stdio.h>
@@ -311,7 +312,7 @@ void MD5Hash::append(const uint8_t *data, int nbytes)
 
 bool MD5Hash::append_file(const string& filepath)
 {
-	FILE *f = fopen(filepath.c_str(), "rb");
+	FILE *f = path_fopen(filepath, "rb");
 
 	if(!f) {
 		fprintf(stderr, "MD5: failed to open file %s\n", filepath.c_str());
diff --git a/intern/cycles/util/util_path.cpp b/intern/cycles/util/util_path.cpp
index e1f016b..8a8326c 100644
--- a/intern/cycles/util/util_path.cpp
+++ b/intern/cycles/util/util_path.cpp
@@ -19,6 +19,7 @@
 #include "util_path.h"
 #include "util_string.h"
 
+#include <OpenImageIO/strutil.h>
 #include <OpenImageIO/sysutil.h>
 OIIO_NAMESPACE_USING
 
@@ -130,7 +131,7 @@ bool path_write_binary(const string& path, const vector<uint8_t>& binary)
 	path_create_directories(path);
 
 	/* write binary file from memory */
-	FILE *f = fopen(path.c_str(), "wb");
+	FILE *f = path_fopen(path, "wb");
 
 	if(!f)
 		return false;
@@ -156,7 +157,7 @@ bool path_read_binary(const string& path, vector<uint8_t>& binary)
 	binary.resize(boost::filesystem::file_size(path));
 
 	/* read binary file into memory */
-	FILE *f = fopen(path.c_str(), "rb");
+	FILE *f = path_fopen(path, "rb");
 
 	if(!f)
 		return false;
@@ -225,5 +226,17 @@ string path_source_replace_includes(const string& source_, const string& path)
 	return source;
 }
 
+FILE *path_fopen(const string& path, const string& mode)
+{
+#ifdef _WIN32
+	string path_utf16 = Strutil::utf8_to_utf16(path);
+	string mode_utf16 = Strutil::utf8_to_utf16(mode);
+
+	return _wfopen(path_utf16.c_str(), mode_utf16.c_str());
+#else
+	return fopen(path.c_str(), mode.c_str());
+#endif
+}
+
 CCL_NAMESPACE_END
 
diff --git a/intern/cycles/util/util_path.h b/intern/cycles/util/util_path.h
index 9b63a42..3cffd7d 100644
--- a/intern/cycles/util/util_path.h
+++ b/intern/cycles/util/util_path.h
@@ -22,6 +22,8 @@
  * linked libraries, the path to the library may be set with path_init, which
  * then makes all paths relative to that. */
 
+#include <stdio.h>
+
 #include "util_string.h"
 #include "util_types.h"
 #include "util_vector.h"
@@ -50,6 +52,8 @@ uint64_t path_modified_time(const string& path);
 
 string path_source_replace_includes(const string& source, const string& path);
 
+FILE *path_fopen(const string& path, const string& mode);
+
 CCL_NAMESPACE_END
 
 #endif