diff --git a/crypto.c b/crypto.c
index 5f10e884..db5b9b09 100644
--- a/crypto.c
+++ b/crypto.c
@@ -300,6 +300,27 @@ bool hget_random_bytes( BYTE* buf, size_t amt, HRANDHAND* randhand )
         arc4random_buf( buf, amt );
     }
 
+#elif defined( USE_GETENTROPY )
+
+    {
+        size_t   chunk, offset = 0;
+
+        while (amt > 0)
+        {
+            chunk = (amt <= MAX_CSRNG_BYTES) ? amt : MAX_CSRNG_BYTES;
+
+            if (getentropy( buf + offset, chunk ) != 0)
+            {
+                // "Crypto: '%s' failed: %s"
+                WRMSG( HHC01494, "E", "getentropy()", strerror( errno ));
+                return false;
+            }
+
+            offset  +=  chunk;
+            amt     -=  chunk;
+        }
+    }
+
 #elif defined( USE_SYS_GETRANDOM )
 
     {
diff --git a/hcrypto.h b/hcrypto.h
index 9da42617..1da0f440 100644
--- a/hcrypto.h
+++ b/hcrypto.h
@@ -20,6 +20,11 @@
     #define NT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)
   #endif
 
+#elif defined( __EMSCRIPTEN__ )
+
+  #define USE_GETENTROPY            // getentropy() (crypto.getRandomValues)
+  #define MAX_CSRNG_BYTES           256  // getentropy() limit
+
 #elif defined( BSD ) || defined( __sun__ )
 
   #define USE_ARC4RANDOM            // (use 'arc4random_buf()' API)