diff --git a/wolfcrypt/benchmark/benchmark.c b/wolfcrypt/benchmark/benchmark.c
index 96c705077..31b2e7bea 100644
--- a/wolfcrypt/benchmark/benchmark.c
+++ b/wolfcrypt/benchmark/benchmark.c
@@ -434,6 +434,7 @@ void bench_rng(void)
 {
     int    ret, i;
     double start, total, persec;
+    int pos, len, remain;
 #ifndef HAVE_LOCAL_RNG
     WC_RNG rng;
 #endif
@@ -450,10 +451,20 @@ void bench_rng(void)
     BEGIN_INTEL_CYCLES
 
     for(i = 0; i < numBlocks; i++) {
-        ret = wc_RNG_GenerateBlock(&rng, plain, sizeof(plain));
-        if (ret < 0) {
-            printf("wc_RNG_GenerateBlock failed %d\n", ret);
-            break;
+        /* Split request to handle large RNG request */
+        pos = 0;
+        remain = (int)sizeof(plain);
+        while (remain > 0) {
+            len = remain;
+            if (len > RNG_MAX_BLOCK_LEN)
+                len = RNG_MAX_BLOCK_LEN;
+            ret = wc_RNG_GenerateBlock(&rng, &plain[pos], len);
+            if (ret < 0) {
+                printf("wc_RNG_GenerateBlock failed %d\n", ret);
+                break;
+            }
+            remain -= len;
+            pos += len;
         }
     }
 
diff --git a/wolfcrypt/src/random.c b/wolfcrypt/src/random.c
index 2b5f40bfc..124e18281 100644
--- a/wolfcrypt/src/random.c
+++ b/wolfcrypt/src/random.c
@@ -194,6 +194,11 @@ int wc_FreeRng(WC_RNG* rng)
 #define DRBG_FAILED       2
 #define DRBG_CONT_FAILED  3
 
+/* Verify max gen block len */
+#if RNG_MAX_BLOCK_LEN > MAX_REQUEST_LEN
+    #error RNG_MAX_BLOCK_LEN is larger than NIST DBRG max request length
+#endif
+    
 
 enum {
     drbgInitC     = 0,
@@ -533,7 +538,7 @@ int wc_RNG_GenerateBlock(WC_RNG* rng, byte* output, word32 sz)
 {
     int ret;
 
-    if (rng == NULL || output == NULL || sz > MAX_REQUEST_LEN)
+    if (rng == NULL || output == NULL || sz > RNG_MAX_BLOCK_LEN)
         return BAD_FUNC_ARG;
 
     if (rng->status != DRBG_OK)
diff --git a/wolfssl/wolfcrypt/random.h b/wolfssl/wolfcrypt/random.h
index cfcc671a2..2e1e1e072 100644
--- a/wolfssl/wolfcrypt/random.h
+++ b/wolfssl/wolfcrypt/random.h
@@ -68,6 +68,8 @@ typedef struct OS_Seed {
     #endif
 } OS_Seed;
 
+/* Maximum generate block length */
+#define RNG_MAX_BLOCK_LEN (0x10000)
 
 #if (defined(HAVE_HASHDRBG) || defined(NO_RC4)) && !defined(CUSTOM_RAND_GENERATE_BLOCK)