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-rw-r--r--src/libstd/rand/os.rs5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/libstd/rand/os.rs b/src/libstd/rand/os.rs
index 60e2c4c8949..ffe8e539ffb 100644
--- a/src/libstd/rand/os.rs
+++ b/src/libstd/rand/os.rs
@@ -136,10 +136,11 @@ mod imp {
     use rand::Rng;
     use result::{Ok, Err};
     use rt::stack;
-    use self::libc::{c_ulong, DWORD, BYTE, LPCSTR, BOOL};
+    use self::libc::{DWORD, BYTE, LPCSTR, BOOL};
+    use self::libc::types::os::arch::extra::{LONG_PTR};
     use slice::MutableVector;
 
-    type HCRYPTPROV = c_ulong;
+    type HCRYPTPROV = LONG_PTR;
 
     /// A random number generator that retrieves randomness straight from
     /// the operating system. Platform sources: