diff --git a/src/nouveau/compiler/nak/ir.rs b/src/nouveau/compiler/nak/ir.rs
index 6bc43aa1168..748c218ce3b 100644
--- a/src/nouveau/compiler/nak/ir.rs
+++ b/src/nouveau/compiler/nak/ir.rs
@@ -1310,13 +1310,12 @@ impl Src {
     }
 
     pub fn is_fneg_zero(&self, src_type: SrcType) -> bool {
-        match self.fold_imm(src_type).src_ref {
-            SrcRef::Zero => self.src_mod == SrcMod::FNeg,
-            SrcRef::Imm32(0x00008000) => src_type == SrcType::F16,
-            SrcRef::Imm32(0x80000000) => {
+        match self.as_u32(src_type) {
+            Some(0x00008000) => src_type == SrcType::F16,
+            Some(0x80000000) => {
                 src_type == SrcType::F32 || src_type == SrcType::F64
             }
-            SrcRef::Imm32(0x80008000) => src_type == SrcType::F16v2,
+            Some(0x80008000) => src_type == SrcType::F16v2,
             _ => false,
         }
     }