diff --git a/src/curand/result.rs b/src/curand/result.rs
index 496233b..0716441 100644
--- a/src/curand/result.rs
+++ b/src/curand/result.rs
@@ -156,6 +156,21 @@ pub mod generate {
         lib().curandGenerate(gen, out, num).result()
     }
 
+    /// Fills `out` with `num` u64 values with all bits random.
+    ///
+    /// See [cuRAND docs](https://docs.nvidia.com/cuda/curand/group__HOST.html#group__HOST_1gd8e23d144e88b8e638139db05ff798b3)
+    ///
+    /// # Safety
+    /// 1. generator must have been allocated and not freed.
+    /// 2. `out` point to `num` values
+    pub unsafe fn uniform_u64(
+        gen: sys::curandGenerator_t,
+        out: *mut u64,
+        num: usize,
+    ) -> Result<(), CurandError> {
+        lib().curandGenerateLongLong(gen, out, num).result()
+    }
+
     /// Fills `out` with `num` f32 values from a normal distribution
     /// parameterized by `mean` and `std`.
     ///
@@ -279,6 +294,12 @@ impl UniformFill<u32> for sys::curandGenerator_t {
     }
 }
 
+impl UniformFill<u64> for sys::curandGenerator_t {
+    unsafe fn fill(self, out: *mut u64, num: usize) -> Result<(), CurandError> {
+        generate::uniform_u64(self, out, num)
+    }
+}
+
 /// Fill with normally distributed numbers of type `T`.
 pub trait NormalFill<T> {
     /// # Safety