diff --git a/configure.ac b/configure.ac
index ff3df97c..18490818 100644
--- a/configure.ac
+++ b/configure.ac
@@ -427,7 +427,7 @@ AC_DEFINE_UNQUOTED([PHATK_KERNNAME], ["phatk121016"], [Filename for phatk kernel
 AC_DEFINE_UNQUOTED([POCLBM_KERNNAME], ["poclbm130302"], [Filename for poclbm kernel])
 AC_DEFINE_UNQUOTED([DIAKGCN_KERNNAME], ["diakgcn121016"], [Filename for diakgcn kernel])
 AC_DEFINE_UNQUOTED([DIABLO_KERNNAME], ["diablo130302"], [Filename for diablo kernel])
-AC_DEFINE_UNQUOTED([SCRYPT_KERNNAME], ["scrypt130302"], [Filename for scrypt kernel])
+AC_DEFINE_UNQUOTED([SCRYPT_KERNNAME], ["scrypt130511"], [Filename for scrypt kernel])
 
 
 AC_SUBST(OPENCL_LIBS)
diff --git a/driver-opencl.c b/driver-opencl.c
index acd5f221..8168aa95 100644
--- a/driver-opencl.c
+++ b/driver-opencl.c
@@ -1325,9 +1325,10 @@ static bool opencl_thread_prepare(struct thr_info *thr)
 	int virtual_gpu = cgpu->virtual_gpu;
 	int i = thr->id;
 	static bool failmessage = false;
+	int buffersize = opt_scrypt ? SCRYPT_BUFFERSIZE : BUFFERSIZE;
 
 	if (!blank_res)
-		blank_res = calloc(BUFFERSIZE, 1);
+		blank_res = calloc(buffersize, 1);
 	if (!blank_res) {
 		applog(LOG_ERR, "Failed to calloc in opencl_thread_init");
 		return false;
@@ -1406,6 +1407,7 @@ static bool opencl_thread_init(struct thr_info *thr)
 	cl_int status = 0;
 	thrdata = calloc(1, sizeof(*thrdata));
 	thr->cgpu_data = thrdata;
+	int buffersize = opt_scrypt ? SCRYPT_BUFFERSIZE : BUFFERSIZE;
 
 	if (!thrdata) {
 		applog(LOG_ERR, "Failed to calloc in opencl_thread_init");
@@ -1433,7 +1435,7 @@ static bool opencl_thread_init(struct thr_info *thr)
 			break;
 	}
 
-	thrdata->res = calloc(BUFFERSIZE, 1);
+	thrdata->res = calloc(buffersize, 1);
 
 	if (!thrdata->res) {
 		free(thrdata);
@@ -1442,7 +1444,7 @@ static bool opencl_thread_init(struct thr_info *thr)
 	}
 
 	status |= clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_TRUE, 0,
-			BUFFERSIZE, blank_res, 0, NULL, NULL);
+				       buffersize, blank_res, 0, NULL, NULL);
 	if (unlikely(status != CL_SUCCESS)) {
 		applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed.");
 		return false;
@@ -1483,6 +1485,8 @@ static int64_t opencl_scanhash(struct thr_info *thr, struct work *work,
 	size_t globalThreads[1];
 	size_t localThreads[1] = { clState->wsize };
 	int64_t hashes;
+	int found = opt_scrypt ? SCRYPT_FOUND : FOUND;
+	int buffersize = opt_scrypt ? SCRYPT_BUFFERSIZE : BUFFERSIZE;
 
 	/* Windows' timer resolution is only 15ms so oversample 5x */
 	if (gpu->dynamic && (++gpu->intervals * dynamic_us) > 70000) {
@@ -1527,7 +1531,7 @@ static int64_t opencl_scanhash(struct thr_info *thr, struct work *work,
 	}
 
 	status = clEnqueueReadBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
-			BUFFERSIZE, thrdata->res, 0, NULL, NULL);
+				     buffersize, thrdata->res, 0, NULL, NULL);
 	if (unlikely(status != CL_SUCCESS)) {
 		applog(LOG_ERR, "Error: clEnqueueReadBuffer failed error %d. (clEnqueueReadBuffer)", status);
 		return -1;
@@ -1542,17 +1546,17 @@ static int64_t opencl_scanhash(struct thr_info *thr, struct work *work,
 	clFinish(clState->commandQueue);
 
 	/* FOUND entry is used as a counter to say how many nonces exist */
-	if (thrdata->res[FOUND]) {
+	if (thrdata->res[found]) {
 		/* Clear the buffer again */
 		status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
-				BUFFERSIZE, blank_res, 0, NULL, NULL);
+					      buffersize, blank_res, 0, NULL, NULL);
 		if (unlikely(status != CL_SUCCESS)) {
 			applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed.");
 			return -1;
 		}
 		applog(LOG_DEBUG, "GPU %d found something?", gpu->device_id);
 		postcalc_hash_async(thr, work, thrdata->res);
-		memset(thrdata->res, 0, BUFFERSIZE);
+		memset(thrdata->res, 0, buffersize);
 		/* This finish flushes the writebuffer set with CL_FALSE in clEnqueueWriteBuffer */
 		clFinish(clState->commandQueue);
 	}
diff --git a/findnonce.c b/findnonce.c
index 2f9d27a7..baa652f1 100644
--- a/findnonce.c
+++ b/findnonce.c
@@ -174,7 +174,7 @@ void precalc_hash(dev_blk_ctx *blk, uint32_t *state, uint32_t *data)
 struct pc_data {
 	struct thr_info *thr;
 	struct work *work;
-	uint32_t res[MAXBUFFERS];
+	uint32_t res[SCRYPT_MAXBUFFERS];
 	pthread_t pth;
 	int found;
 };
@@ -184,20 +184,21 @@ static void *postcalc_hash(void *userdata)
 	struct pc_data *pcd = (struct pc_data *)userdata;
 	struct thr_info *thr = pcd->thr;
 	unsigned int entry = 0;
+	int found = opt_scrypt ? SCRYPT_FOUND : FOUND;
 
 	pthread_detach(pthread_self());
 
 	/* To prevent corrupt values in FOUND from trying to read beyond the
 	 * end of the res[] array */
-	if (unlikely(pcd->res[FOUND] & ~FOUND)) {
+	if (unlikely(pcd->res[found] & ~found)) {
 		applog(LOG_WARNING, "%s%d: invalid nonce count - HW error",
 				thr->cgpu->drv->name, thr->cgpu->device_id);
 		hw_errors++;
 		thr->cgpu->hw_errors++;
-		pcd->res[FOUND] &= FOUND;
+		pcd->res[found] &= found;
 	}
 
-	for (entry = 0; entry < pcd->res[FOUND]; entry++) {
+	for (entry = 0; entry < pcd->res[found]; entry++) {
 		uint32_t nonce = pcd->res[entry];
 
 		applog(LOG_DEBUG, "OCL NONCE %u found in slot %d", nonce, entry);
@@ -213,6 +214,8 @@ static void *postcalc_hash(void *userdata)
 void postcalc_hash_async(struct thr_info *thr, struct work *work, uint32_t *res)
 {
 	struct pc_data *pcd = malloc(sizeof(struct pc_data));
+	int buffersize;
+
 	if (unlikely(!pcd)) {
 		applog(LOG_ERR, "Failed to malloc pc_data in postcalc_hash_async");
 		return;
@@ -220,7 +223,8 @@ void postcalc_hash_async(struct thr_info *thr, struct work *work, uint32_t *res)
 
 	pcd->thr = thr;
 	pcd->work = copy_work(work);
-	memcpy(&pcd->res, res, BUFFERSIZE);
+	buffersize = opt_scrypt ? SCRYPT_BUFFERSIZE : BUFFERSIZE;
+	memcpy(&pcd->res, res, buffersize);
 
 	if (pthread_create(&pcd->pth, NULL, postcalc_hash, (void *)pcd)) {
 		applog(LOG_ERR, "Failed to create postcalc_hash thread");
diff --git a/findnonce.h b/findnonce.h
index 610f6f8d..fc5a157f 100644
--- a/findnonce.h
+++ b/findnonce.h
@@ -8,6 +8,10 @@
 #define BUFFERSIZE (sizeof(uint32_t) * MAXBUFFERS)
 #define FOUND (0x0F)
 
+#define SCRYPT_MAXBUFFERS (0x100)
+#define SCRYPT_BUFFERSIZE (sizeof(uint32_t) * SCRYPT_MAXBUFFERS)
+#define SCRYPT_FOUND (0xFF)
+
 #ifdef HAVE_OPENCL
 extern void precalc_hash(dev_blk_ctx *blk, uint32_t *state, uint32_t *data);
 extern void postcalc_hash_async(struct thr_info *thr, struct work *work, uint32_t *res);
diff --git a/ocl.c b/ocl.c
index 8709f4f0..4a1724df 100644
--- a/ocl.c
+++ b/ocl.c
@@ -826,7 +826,8 @@ built:
 			applog(LOG_ERR, "Error %d: clCreateBuffer (CLbuffer0)", status);
 			return NULL;
 		}
-	}
+		clState->outputBuffer = clCreateBuffer(clState->context, CL_MEM_WRITE_ONLY, SCRYPT_BUFFERSIZE, NULL, &status);
+	} else
 #endif
 	clState->outputBuffer = clCreateBuffer(clState->context, CL_MEM_WRITE_ONLY, BUFFERSIZE, NULL, &status);
 	if (status != CL_SUCCESS) {
diff --git a/scrypt130302.cl b/scrypt130511.cl
similarity index 96%
rename from scrypt130302.cl
rename to scrypt130511.cl
index 6979458d..5ae0304d 100644
--- a/scrypt130302.cl
+++ b/scrypt130511.cl
@@ -808,8 +808,8 @@ void scrypt_core(uint4 X[8], __global uint4*restrict lookup)
 	unshittify(X);
 }
 
-#define FOUND (0x0F)
-#define SETFOUND(Xnonce) output[output[FOUND]++] = Xnonce
+#define SCRYPT_FOUND (0xFF)
+#define SETFOUND(Xnonce) output[output[SCRYPT_FOUND]++] = Xnonce
 
 __attribute__((reqd_work_group_size(WORKSIZE, 1, 1)))
 __kernel void search(__global const uint4 * restrict input,