diff --git a/examples_cuda/aobench/ao.cu b/examples_cuda/aobench/ao.cu
index ca0db34b..8a80281f 100644
--- a/examples_cuda/aobench/ao.cu
+++ b/examples_cuda/aobench/ao.cu
@@ -93,6 +93,49 @@ struct Float3
   }
 };
 
+///////////////////////////////////////////////////////////////////////////
+// RNG stuff
+
+struct RNGState {
+    unsigned int z1, z2, z3, z4;
+};
+
+__device__
+static inline unsigned int random(RNGState * state)
+{
+    unsigned int b;
+
+    b  = ((state->z1 << 6) ^ state->z1) >> 13;
+    state->z1 = ((state->z1 & 4294967294U) << 18) ^ b;
+    b  = ((state->z2 << 2) ^ state->z2) >> 27; 
+    state->z2 = ((state->z2 & 4294967288U) << 2) ^ b;
+    b  = ((state->z3 << 13) ^ state->z3) >> 21;
+    state->z3 = ((state->z3 & 4294967280U) << 7) ^ b;
+    b  = ((state->z4 << 3) ^ state->z4) >> 12;
+    state->z4 = ((state->z4 & 4294967168U) << 13) ^ b;
+    return (state->z1 ^ state->z2 ^ state->z3 ^ state->z4);
+}
+
+
+__device__
+static inline float frandom(RNGState * state)
+{
+    unsigned int irand = random(state);
+    irand &= (1ul<<23)-1;
+    return __int_as_float(0x3F800000 | irand)-1.0f;
+}
+
+__device__
+static inline void seed_rng(RNGState * state, 
+                            unsigned int seed) {
+    state->z1 = seed;
+    state->z2 = seed ^ 0xbeeff00d;
+    state->z3 = ((seed & 0xfffful) << 16) | (seed >> 16);
+    state->z4 = (((seed & 0xfful) << 24) | ((seed & 0xff00ul)  << 8) |
+                 ((seed & 0xff0000ul) >> 8) | (seed & 0xff000000ul) >> 24);
+}
+
+
 #define programCount 32
 #define programIndex (threadIdx.x & 31)
 #define taskIndex0 (blockIdx.x*4 + (threadIdx.x >> 5))
diff --git a/examples_cuda/aobench/ao_cu.cpp b/examples_cuda/aobench/ao_cu.cpp
index 1432a380..992ed232 100755
--- a/examples_cuda/aobench/ao_cu.cpp
+++ b/examples_cuda/aobench/ao_cu.cpp
@@ -232,7 +232,6 @@ std::vector<char> readBinary(const char * filename)
 
 extern "C" 
 {
-
   void *CUDAAlloc(void **handlePtr, int64_t size, int32_t alignment)
   {
     return NULL;