diff --git a/include/mlir-hlo/Dialect/mhlo/transforms/map_lmhlo_to_scalar_op.h b/include/mlir-hlo/Dialect/mhlo/transforms/map_lmhlo_to_scalar_op.h
index 636cd8c..7ce33fb 100644
--- a/include/mlir-hlo/Dialect/mhlo/transforms/map_lmhlo_to_scalar_op.h
+++ b/include/mlir-hlo/Dialect/mhlo/transforms/map_lmhlo_to_scalar_op.h
@@ -288,7 +288,12 @@ inline Value MapLhloOpToStdScalarOp<lmhlo::ConvertOp>(
   Type sourceType = getElementTypeOrSelf(args.front().getType());
   Type targetType = getElementTypeOrSelf(result_types.front());
 
-  if (mlir::SIToFPOp::areCastCompatible(sourceType, targetType)) {
+  // A boolean value is considered to be unsigned when converting to
+  // floating-point. Otherwise, it will become `-1`.
+  if (sourceType.isInteger(/*width=*/1) &&
+      mlir::UIToFPOp::areCastCompatible(sourceType, targetType)) {
+    return b->create<mlir::UIToFPOp>(loc, result_types, args, mlir::None);
+  } else if (mlir::SIToFPOp::areCastCompatible(sourceType, targetType)) {
     return b->create<mlir::SIToFPOp>(loc, result_types, args, mlir::None);
   } else if (sourceType.isa<FloatType>() && targetType.isa<FloatType>()) {
     FloatType src = sourceType.cast<FloatType>();
diff --git a/tests/hlo-legalize-to-linalg.mlir b/tests/hlo-legalize-to-linalg.mlir
index 159a616..4b2f354 100644
--- a/tests/hlo-legalize-to-linalg.mlir
+++ b/tests/hlo-legalize-to-linalg.mlir
@@ -608,6 +608,19 @@ func @reshape_multiple_collapse
 
 // -----
 
+// CHECK-LABEL: func @convert_i1_to_f32
+func @convert_i1_to_f32(%input: tensor<2x2xi1>) -> tensor<2x2xf32> {
+  %result = "mhlo.convert"(%input) : (tensor<2x2xi1>) -> tensor<2x2xf32>
+  return %result : tensor<2x2xf32>
+}
+// CHECK: linalg.init_tensor
+// CHECK: linalg.generic
+// CHECK-NEXT: ^bb0(%[[OPERAND_IN:.*]]: i1, %{{.*}}: f32):
+// CHECK-NEXT:   %[[RESULT:.*]] = uitofp %[[OPERAND_IN]] : i1 to f32
+// CHECK-NEXT:   linalg.yield %[[RESULT]] : f32
+
+// -----
+
 // CHECK-LABEL: func @convert_i32_to_f32
 func @convert_i32_to_f32(%input: tensor<2x2xi32>) -> tensor<2x2xf32> {
   %result = "mhlo.convert"(%input) : (tensor<2x2xi32>) -> tensor<2x2xf32>
diff --git a/tests/lhlo-legalize-to-linalg.mlir b/tests/lhlo-legalize-to-linalg.mlir
index 1180847..3c75795 100644
--- a/tests/lhlo-legalize-to-linalg.mlir
+++ b/tests/lhlo-legalize-to-linalg.mlir
@@ -404,6 +404,18 @@ func @ceil(%input: memref<2x2xf32>, %result: memref<2x2xf32>) {
 
 // -----
 
+// CHECK-LABEL: func @convert_i1_to_f32
+func @convert_i1_to_f32(%input: memref<2x2xi1>, %result: memref<2x2xf32>) {
+  "lmhlo.convert"(%input, %result) : (memref<2x2xi1>, memref<2x2xf32>) -> ()
+  return
+}
+// CHECK: linalg.generic
+// CHECK-NEXT: ^bb0(%[[OPERAND_IN:.*]]: i1, %[[RESULT_OUT:.*]]: f32):
+// CHECK-NEXT:   %[[RESULT:.*]] = uitofp %[[OPERAND_IN]] : i1 to f32
+// CHECK-NEXT:   linalg.yield %[[RESULT]] : f32
+
+// -----
+
 // CHECK-LABEL: func @convert_i32_to_f32
 func @convert_i32_to_f32(%input: memref<2x2xi32>, %result: memref<2x2xf32>) {
   "lmhlo.convert"(%input, %result) : (memref<2x2xi32>, memref<2x2xf32>) -> ()