diff --git a/src/compiler/nir/nir_algebraic.py b/src/compiler/nir/nir_algebraic.py
index b7efcf93c91..75f7390aa77 100644
--- a/src/compiler/nir/nir_algebraic.py
+++ b/src/compiler/nir/nir_algebraic.py
@@ -258,11 +258,11 @@ class Constant(Value):
          # Explicitly sign-extend negative integers to 64-bit, ensuring correct
          # handling of -INT32_MIN which is not representable in 32-bit.
          if self.value < 0:
-            return hex(struct.unpack('Q', struct.pack('q', self.value))[0])
+            return hex(struct.unpack('Q', struct.pack('q', self.value))[0]) + 'ull'
          else:
-            return hex(self.value)
+            return hex(self.value) + 'ull'
       elif isinstance(self.value, float):
-         return hex(struct.unpack('Q', struct.pack('d', self.value))[0])
+         return hex(struct.unpack('Q', struct.pack('d', self.value))[0]) + 'ull'
       else:
          assert False