diff --git a/src/Microsoft.DotNet.ProjectJsonMigration/Microsoft.DotNet.Internal.ProjectModel/ProjectReader.cs b/src/Microsoft.DotNet.ProjectJsonMigration/Microsoft.DotNet.Internal.ProjectModel/ProjectReader.cs
index c5b67bf17..d3ac59047 100644
--- a/src/Microsoft.DotNet.ProjectJsonMigration/Microsoft.DotNet.Internal.ProjectModel/ProjectReader.cs
+++ b/src/Microsoft.DotNet.ProjectJsonMigration/Microsoft.DotNet.Internal.ProjectModel/ProjectReader.cs
@@ -504,12 +504,6 @@ namespace Microsoft.DotNet.Internal.ProjectModel
 
             // Add the target framework specific define
             var defines = new HashSet<string>(compilerOptions.Defines ?? Enumerable.Empty<string>());
-            var frameworkDefine = MakeDefaultTargetFrameworkDefine(frameworkName);
-
-            if (!string.IsNullOrEmpty(frameworkDefine))
-            {
-                defines.Add(frameworkDefine);
-            }
 
             compilerOptions.Defines = defines;
 
@@ -806,34 +800,6 @@ namespace Microsoft.DotNet.Internal.ProjectModel
             return null;
         }
 
-        private static string MakeDefaultTargetFrameworkDefine(NuGetFramework targetFramework)
-        {
-            var shortName = targetFramework.GetTwoDigitShortFolderName();
-
-            if (targetFramework.IsPCL)
-            {
-                return null;
-            }
-
-            var candidateName = shortName.ToUpperInvariant();
-
-            // Replace '-', '.', and '+' in the candidate name with '_' because TFMs with profiles use those (like "net40-client")
-            // and we want them representable as defines (i.e. "NET40_CLIENT")
-            candidateName = candidateName.Replace('-', '_').Replace('+', '_').Replace('.', '_');
-
-            // We require the following from our Target Framework Define names
-            // Starts with A-Z or _
-            // Contains only A-Z, 0-9 and _
-            if (!string.IsNullOrEmpty(candidateName) &&
-                (char.IsLetter(candidateName[0]) || candidateName[0] == '_') &&
-                candidateName.All(c => Char.IsLetterOrDigit(c) || c == '_'))
-            {
-                return candidateName;
-            }
-
-            return null;
-        }
-
         private static bool HasProjectFile(string path)
         {
             string projectPath = Path.Combine(path, Project.FileName);
diff --git a/test/Microsoft.DotNet.ProjectJsonMigration.Tests/Rules/GivenThatIWantToMigrateConfigurations.cs b/test/Microsoft.DotNet.ProjectJsonMigration.Tests/Rules/GivenThatIWantToMigrateConfigurations.cs
index b5033280c..a287d7961 100644
--- a/test/Microsoft.DotNet.ProjectJsonMigration.Tests/Rules/GivenThatIWantToMigrateConfigurations.cs
+++ b/test/Microsoft.DotNet.ProjectJsonMigration.Tests/Rules/GivenThatIWantToMigrateConfigurations.cs
@@ -62,6 +62,21 @@ namespace Microsoft.DotNet.ProjectJsonMigration.Tests
                 .Contain("'$(TargetFramework)' == 'netcoreapp1.0'");
         }
 
+        [Fact]
+        public void It_does_not_add_a_define_for_the_framework()
+        {
+            var mockProj = RunConfigurationsRuleOnPj(@"
+                {
+                    ""frameworks"": {
+                        ""netcoreapp1.0"": {
+                        }
+                    }
+                }");
+
+            mockProj.Properties.Count(
+                prop => prop.Name == "DefineConstants" && prop.Value.Contains("NETCOREAPP1_0")).Should().Be(0);
+        }
+
         [Fact]
         public void Configuration_buildOptions_properties_are_not_written_when_they_overlap_with_buildOptions()
         {