diff --git a/libretro/Makefile b/libretro/Makefile
index bcdf3781..407aed5f 100644
--- a/libretro/Makefile
+++ b/libretro/Makefile
@@ -151,6 +151,7 @@ $(DOWNLOADS)/ruby/configure.ac:
 	cd $(DOWNLOADS)/ruby && $(GIT) apply ${PWD}/ruby-stack-pointer.patch
 	cd $(DOWNLOADS)/ruby && $(GIT) apply ${PWD}/ruby-jump-buffer.patch
 	cd $(DOWNLOADS)/ruby && $(GIT) apply ${PWD}/ruby-compat.patch
+	cd $(DOWNLOADS)/ruby && $(GIT) apply ${PWD}/ruby-prng-time.patch
 	echo '#include "${PWD}/ruby-bindings.h"' >> $(DOWNLOADS)/ruby/gc.c
 
 # WABT (targets the build machine)
diff --git a/libretro/ruby-prng-time.patch b/libretro/ruby-prng-time.patch
new file mode 100644
index 00000000..27a0de14
--- /dev/null
+++ b/libretro/ruby-prng-time.patch
@@ -0,0 +1,49 @@
+# Removes the dependency of the Ruby pseudorandom number generator's seed on the system time for better save state determinism.
+
+--- a/random.c
++++ b/random.c
+@@ -680,28 +680,28 @@ static void
+ fill_random_seed(uint32_t *seed, size_t cnt)
+ {
+     static rb_atomic_t n = 0;
+-#if defined HAVE_CLOCK_GETTIME
+-    struct timespec tv;
+-#elif defined HAVE_GETTIMEOFDAY
+-    struct timeval tv;
+-#endif
++
++
++
++
++
+     size_t len = cnt * sizeof(*seed);
+ 
+     memset(seed, 0, len);
+ 
+     fill_random_bytes(seed, len, FALSE);
+ 
+-#if defined HAVE_CLOCK_GETTIME
+-    clock_gettime(CLOCK_REALTIME, &tv);
+-    seed[0] ^= tv.tv_nsec;
+-#elif defined HAVE_GETTIMEOFDAY
+-    gettimeofday(&tv, 0);
+-    seed[0] ^= tv.tv_usec;
+-#endif
+-    seed[1] ^= (uint32_t)tv.tv_sec;
+-#if SIZEOF_TIME_T > SIZEOF_INT
+-    seed[0] ^= (uint32_t)((time_t)tv.tv_sec >> SIZEOF_INT * CHAR_BIT);
+-#endif
++
++
++
++
++
++
++
++
++
++
++
+     seed[2] ^= getpid() ^ (ATOMIC_FETCH_ADD(n, 1) << 16);
+     seed[3] ^= (uint32_t)(VALUE)&seed;
+ #if SIZEOF_VOIDP > SIZEOF_INT