diff --git a/src/compiler/nir/nir_algebraic.py b/src/compiler/nir/nir_algebraic.py
index be26b60d32e..b7efcf93c91 100644
--- a/src/compiler/nir/nir_algebraic.py
+++ b/src/compiler/nir/nir_algebraic.py
@@ -255,7 +255,12 @@ class Constant(Value):
       if isinstance(self.value, (bool)):
          return 'NIR_TRUE' if self.value else 'NIR_FALSE'
       if isinstance(self.value, int):
-         return hex(self.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])
+         else:
+            return hex(self.value)
       elif isinstance(self.value, float):
          return hex(struct.unpack('Q', struct.pack('d', self.value))[0])
       else: