--- a/sysoptions.h
+++ b/sysoptions.h
@@ -256,7 +256,7 @@
 /* Source for randomness. This must be able to provide hundreds of bytes per SSH
  * connection without blocking. */
 #ifndef DROPBEAR_URANDOM_DEV
-#define DROPBEAR_URANDOM_DEV "/dev/urandom"
+#define DROPBEAR_URANDOM_DEV "/dev/random"
 #endif
 
 /* client keyboard interactive authentication is often used for password auth.