diff --git a/src/shader_recompiler/frontend/translate/scalar_alu.cpp b/src/shader_recompiler/frontend/translate/scalar_alu.cpp
index 5c6164d6c..3a2b01a90 100644
--- a/src/shader_recompiler/frontend/translate/scalar_alu.cpp
+++ b/src/shader_recompiler/frontend/translate/scalar_alu.cpp
@@ -604,7 +604,7 @@ void Translator::S_FF1_I32_B32(const GcnInst& inst) {
 void Translator::S_FF1_I32_B64(const GcnInst& inst) {
     const IR::U64 src0{GetSrc64(inst.src[0])};
     const IR::U32 result{
-        ir.Select(ir.IEqual(src0, ir.Imm64(u64(0))), ir.Imm64(s64(-1)), ir.FindILsb(src0))};
+        ir.Select(ir.IEqual(src0, ir.Imm64(u64(0))), ir.Imm32(-1), ir.FindILsb(src0))};
     SetDst(inst.dst[0], result);
 }