diff --git a/src/ast/type/type.cc b/src/ast/type/type.cc
index 55d045a..f9e9694 100644
--- a/src/ast/type/type.cc
+++ b/src/ast/type/type.cc
@@ -103,6 +103,17 @@
   return is_float_scalar() || is_float_vector();
 }
 
+bool Type::is_integer_scalar() {
+  return IsU32() || IsI32();
+}
+
+bool Type::is_integer_vector() {
+  if (!IsVector()) {
+    return false;
+  }
+  return AsVector()->type()->IsU32() || AsVector()->type()->IsI32();
+}
+
 bool Type::is_unsigned_scalar_or_vector() {
   return IsU32() || (IsVector() && AsVector()->type()->IsU32());
 }
diff --git a/src/ast/type/type.h b/src/ast/type/type.h
index 52e8c81..12c9b11 100644
--- a/src/ast/type/type.h
+++ b/src/ast/type/type.h
@@ -77,6 +77,10 @@
   bool is_float_vector();
   /// @returns true if this type is a float scalar or vector
   bool is_float_scalar_or_vector();
+  /// @returns ture if this type is an integer scalar
+  bool is_integer_scalar();
+  /// @returns ture if this type is an integer vector
+  bool is_integer_vector();
   /// @returns true if this type is an unsigned scalar or vector
   bool is_unsigned_scalar_or_vector();
   /// @returns true if this type is a signed scalar or vector
diff --git a/src/type_determiner.cc b/src/type_determiner.cc
index 34fc922..3978bfe 100644
--- a/src/type_determiner.cc
+++ b/src/type_determiner.cc
@@ -676,10 +676,12 @@
     {"reflect", 2, GLSLstd450Reflect, GlslDataType::kFloatScalarOrVector},
     {"round", 1, GLSLstd450Round, GlslDataType::kFloatScalarOrVector},
     {"roundeven", 1, GLSLstd450RoundEven, GlslDataType::kFloatScalarOrVector},
+    {"sabs", 1, GLSLstd450SAbs, GlslDataType::kIntScalarOrVector},
     {"sin", 1, GLSLstd450Sin, GlslDataType::kFloatScalarOrVector},
     {"sinh", 1, GLSLstd450Sinh, GlslDataType::kFloatScalarOrVector},
     {"smoothstep", 3, GLSLstd450SmoothStep, GlslDataType::kFloatScalarOrVector},
     {"sqrt", 1, GLSLstd450Sqrt, GlslDataType::kFloatScalarOrVector},
+    {"ssign", 1, GLSLstd450SSign, GlslDataType::kIntScalarOrVector},
     {"step", 2, GLSLstd450Step, GlslDataType::kFloatScalarOrVector},
     {"tan", 1, GLSLstd450Tan, GlslDataType::kFloatScalarOrVector},
     {"tanh", 1, GLSLstd450Tanh, GlslDataType::kFloatScalarOrVector},
@@ -729,6 +731,12 @@
 
         break;
       case GlslDataType::kIntScalarOrVector:
+        if (!result_types.back()->is_integer_scalar_or_vector()) {
+          set_error(source,
+                    "incorrect type for " + name + ". " +
+                        "Requires integer scalar or integer vector values");
+          return nullptr;
+        }
         break;
     }
   }
diff --git a/src/type_determiner_test.cc b/src/type_determiner_test.cc
index 4c24c90..c229837 100644
--- a/src/type_determiner_test.cc
+++ b/src/type_determiner_test.cc
@@ -2606,5 +2606,114 @@
                     GLSLData{"fma", GLSLstd450Fma},
                     GLSLData{"faceforward", GLSLstd450FaceForward},
                     GLSLData{"nclamp", GLSLstd450NClamp}));
+
+using ImportData_Int_SingleParamTest = TypeDeterminerTestWithParam<GLSLData>;
+TEST_P(ImportData_Int_SingleParamTest, Scalar) {
+  auto param = GetParam();
+
+  ast::type::I32Type i32;
+
+  ast::ExpressionList params;
+  params.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", param.name, params, &id);
+  ASSERT_NE(type, nullptr);
+  EXPECT_TRUE(type->is_integer_scalar());
+  EXPECT_EQ(id, param.value);
+}
+
+TEST_P(ImportData_Int_SingleParamTest, Vector) {
+  auto param = GetParam();
+
+  ast::type::I32Type i32;
+  ast::type::VectorType vec(&i32, 3);
+
+  ast::ExpressionList vals;
+  vals.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+  vals.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+  vals.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 3)));
+
+  ast::ExpressionList params;
+  params.push_back(
+      std::make_unique<ast::TypeConstructorExpression>(&vec, std::move(vals)));
+
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", param.name, params, &id);
+  ASSERT_NE(type, nullptr);
+  EXPECT_TRUE(type->is_integer_vector());
+  EXPECT_EQ(type->AsVector()->size(), 3u);
+  EXPECT_EQ(id, param.value);
+}
+
+TEST_P(ImportData_Int_SingleParamTest, Error_Float) {
+  auto param = GetParam();
+
+  ast::type::F32Type f32;
+
+  ast::ExpressionList params;
+  params.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::FloatLiteral>(&f32, 1.f)));
+
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", param.name, params, &id);
+  ASSERT_EQ(type, nullptr);
+  EXPECT_EQ(td()->error(),
+            std::string("incorrect type for ") + param.name +
+                ". Requires integer scalar or integer vector values");
+}
+
+TEST_P(ImportData_Int_SingleParamTest, Error_NoParams) {
+  auto param = GetParam();
+
+  ast::ExpressionList params;
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", param.name, params, &id);
+  ASSERT_EQ(type, nullptr);
+  EXPECT_EQ(td()->error(), std::string("incorrect number of parameters for ") +
+                               param.name + ". Expected 1 got 0");
+}
+
+TEST_P(ImportData_Int_SingleParamTest, Error_MultipleParams) {
+  auto param = GetParam();
+
+  ast::type::I32Type i32;
+  ast::ExpressionList params;
+  params.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+  params.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+  params.push_back(std::make_unique<ast::ScalarConstructorExpression>(
+      std::make_unique<ast::SintLiteral>(&i32, 1)));
+
+  ASSERT_TRUE(td()->DetermineResultType(params)) << td()->error();
+
+  uint32_t id = 0;
+  auto* type =
+      td()->GetImportData({0, 0}, "GLSL.std.450", param.name, params, &id);
+  ASSERT_EQ(type, nullptr);
+  EXPECT_EQ(td()->error(), std::string("incorrect number of parameters for ") +
+                               param.name + ". Expected 1 got 3");
+}
+
+INSTANTIATE_TEST_SUITE_P(TypeDeterminerTest,
+                         ImportData_Int_SingleParamTest,
+                         testing::Values(GLSLData{"sabs", GLSLstd450SAbs},
+                                         GLSLData{"ssign", GLSLstd450SSign}));
+
 }  // namespace
 }  // namespace tint