diff --git a/ethosu/regor/architecture/ethosu85/ethos_u85_constraints.cpp b/ethosu/regor/architecture/ethosu85/ethos_u85_constraints.cpp
index 338a65b32b001593c47f2ea4bdef648365933b0b..535ede5ca4e0390d4d75603a34a3fe4b125ff5cb 100644
--- a/ethosu/regor/architecture/ethosu85/ethos_u85_constraints.cpp
+++ b/ethosu/regor/architecture/ethosu85/ethos_u85_constraints.cpp
@@ -130,7 +130,9 @@ bool EthosU85Constraints::SupportsFusedRescale(OpType opType, TensorUsage tensor
         else if ( npuOp == EthosU85NpuOp::Resize && globalScale )
         {
             auto &qs = quantization.scales.front();
-            return qs.scale == 1 && qs.shift >= 16;  // Only shift of 16 or more supported
+            // Only shift < 48 supported
+            const auto normalized = QuantizedScale::ReduceScale(qs);
+            return normalized.scale == 1 && normalized.shift < 48;
         }
         else if ( npuOp == EthosU85NpuOp::Elementwise && globalScale )
         {
diff --git a/ethosu/regor/architecture/ethosu85/ethos_u85_register_cs_generator.cpp b/ethosu/regor/architecture/ethosu85/ethos_u85_register_cs_generator.cpp
index 066d4bb2825ef40ec4bb143941de4f47ae8fb268..6a41e69ec4be6afab4b8bd6bd89968c0eb41cc45 100644
--- a/ethosu/regor/architecture/ethosu85/ethos_u85_register_cs_generator.cpp
+++ b/ethosu/regor/architecture/ethosu85/ethos_u85_register_cs_generator.cpp
@@ -1906,8 +1906,9 @@ void EthosU85RCSGenerator::GenerateResizeOp(HLCStripe *stripe, MemoryAccesses &m
     // calculate ifm width read
     int ifmWidthRead = ((ofmShape.Width() - 1) * scale_w.d + offset_w) / scale_w.n + 2;
 
-    // scaling is shift only and + 16
-    QuantizedScale ofmScale = op->ofm.quantization.scales[0];
+    // scaling is shift only and + 16, so convert to scale 1 and add 16
+    const QuantizedScale ofmScale = QuantizedScale::ReduceScale(op->ofm.quantization.scales.front());
+    assert(ofmScale.scale == 1);
     int shift = 16 + ofmScale.shift;
 
     // X - width
diff --git a/ethosu/regor/common/scaling.cpp b/ethosu/regor/common/scaling.cpp
index 1032a10267d16ad86a3d69516122bea6e229b68c..1e5d4d0f0da6c4f363ecda5097eaedb789752d4b 100644
--- a/ethosu/regor/common/scaling.cpp
+++ b/ethosu/regor/common/scaling.cpp
@@ -81,6 +81,18 @@ const QuantizedScale &QuantizedScale::Unit()
     return unitScale;
 }
 
+QuantizedScale QuantizedScale::ReduceScale(const QuantizedScale &qs)
+{
+    auto scale = qs.scale;
+    auto shift = qs.shift;
+    while ( scale > 1 && (scale & 0x1) == 0 && shift > 0 )
+    {
+        scale >>= 1;
+        shift--;
+    }
+    return {scale, shift};
+}
+
 // Convert int32_t multiplier to int16_t with rounding.
 int16_t DownScaleInt32ToInt16Multiplier(int32_t multiplier)
 {
diff --git a/ethosu/regor/common/scaling.hpp b/ethosu/regor/common/scaling.hpp
index 54fd722936a6f7c080b75562874a14a20b29564c..0b4d0360af3209bb9fb76809abf24ae717c5e026 100644
--- a/ethosu/regor/common/scaling.hpp
+++ b/ethosu/regor/common/scaling.hpp
@@ -1,5 +1,5 @@
 //
-// SPDX-FileCopyrightText: Copyright 2021-2024 Arm Limited and/or its affiliates <open-source-office@arm.com>
+// SPDX-FileCopyrightText: Copyright 2021-2025 Arm Limited and/or its affiliates <open-source-office@arm.com>
 //
 // SPDX-License-Identifier: Apache-2.0
 //
@@ -46,6 +46,7 @@ public:
      * Unit scale, i.e. no scaling
      */
     static const QuantizedScale &Unit();
+    static QuantizedScale ReduceScale(const QuantizedScale &qs);
 };
 
 /* Calculate elementwise Mul OFM QuantizedScale */
diff --git a/ethosu/regor/compiler/graphir_optimiser.cpp b/ethosu/regor/compiler/graphir_optimiser.cpp
index 644b55be1ab27fc512e17b6c80ee51a7c798af2f..7d0c68d8f133b06ee76e80862deb0618c416d934 100644
--- a/ethosu/regor/compiler/graphir_optimiser.cpp
+++ b/ethosu/regor/compiler/graphir_optimiser.cpp
@@ -901,7 +901,7 @@ Operation *GraphIrOptimiser::FuseRescale(Graph *const graph, Operation *const op
             {
                 if ( qs.shift > 0 && qs.shift < 31 && (qs.scale % (1 << qs.shift)) == 0 )
                 {
-                    qs = {(qs.scale >> qs.shift), 0};
+                    qs = QuantizedScale::ReduceScale(qs);
                 }
             }
             return scales;