diff --git a/Source/cmExportBuildFileGenerator.cxx b/Source/cmExportBuildFileGenerator.cxx
index 30a52d476..134ee98aa 100644
--- a/Source/cmExportBuildFileGenerator.cxx
+++ b/Source/cmExportBuildFileGenerator.cxx
@@ -68,6 +68,16 @@ bool cmExportBuildFileGenerator::GenerateMainFile(std::ostream& os)
       tei != this->Exports.end(); ++tei)
     {
     cmTarget* te = *tei;
+    if (te->GetProperty("INTERFACE_SOURCES"))
+      {
+      cmOStringStream e;
+      e << "Target \""
+        << te->GetName()
+        << "\" has a populated INTERFACE_SOURCES property.  This is not "
+          "currently supported.";
+      cmSystemTools::Error(e.str().c_str());
+      return false;
+      }
     this->GenerateImportTargetCode(os, te);
 
     te->AppendBuildInterfaceIncludes();
diff --git a/Source/cmExportInstallFileGenerator.cxx b/Source/cmExportInstallFileGenerator.cxx
index 89071c052..23180f1bf 100644
--- a/Source/cmExportInstallFileGenerator.cxx
+++ b/Source/cmExportInstallFileGenerator.cxx
@@ -123,6 +123,17 @@ bool cmExportInstallFileGenerator::GenerateMainFile(std::ostream& os)
     {
     cmTarget* te = (*tei)->Target;
 
+    if (te->GetProperty("INTERFACE_SOURCES"))
+      {
+      cmOStringStream e;
+      e << "Target \""
+        << te->GetName()
+        << "\" has a populated INTERFACE_SOURCES property.  This is not "
+          "currently supported.";
+      cmSystemTools::Error(e.str().c_str());
+      return false;
+      }
+
     requiresConfigFiles = requiresConfigFiles
                               || te->GetType() != cmTarget::INTERFACE_LIBRARY;
 
diff --git a/Tests/RunCMake/TargetSources/ExportBuild-result.txt b/Tests/RunCMake/TargetSources/ExportBuild-result.txt
new file mode 100644
index 000000000..d00491fd7
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/ExportBuild-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/TargetSources/ExportBuild-stderr.txt b/Tests/RunCMake/TargetSources/ExportBuild-stderr.txt
new file mode 100644
index 000000000..0d65a558b
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/ExportBuild-stderr.txt
@@ -0,0 +1 @@
+CMake Error: Target "iface" has a populated INTERFACE_SOURCES property.  This is not currently supported.
diff --git a/Tests/RunCMake/TargetSources/ExportBuild.cmake b/Tests/RunCMake/TargetSources/ExportBuild.cmake
new file mode 100644
index 000000000..b626aa6cd
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/ExportBuild.cmake
@@ -0,0 +1,5 @@
+
+add_library(iface INTERFACE)
+target_sources(iface INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/empty_1.cpp")
+
+export(TARGETS iface FILE ${CMAKE_CURRENT_BINARY_DIR}/targets.cmake)
diff --git a/Tests/RunCMake/TargetSources/ExportInstall-result.txt b/Tests/RunCMake/TargetSources/ExportInstall-result.txt
new file mode 100644
index 000000000..d00491fd7
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/ExportInstall-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/TargetSources/ExportInstall-stderr.txt b/Tests/RunCMake/TargetSources/ExportInstall-stderr.txt
new file mode 100644
index 000000000..0d65a558b
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/ExportInstall-stderr.txt
@@ -0,0 +1 @@
+CMake Error: Target "iface" has a populated INTERFACE_SOURCES property.  This is not currently supported.
diff --git a/Tests/RunCMake/TargetSources/ExportInstall.cmake b/Tests/RunCMake/TargetSources/ExportInstall.cmake
new file mode 100644
index 000000000..8e7c9f93f
--- /dev/null
+++ b/Tests/RunCMake/TargetSources/ExportInstall.cmake
@@ -0,0 +1,6 @@
+
+add_library(iface INTERFACE)
+target_sources(iface INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/empty_1.cpp")
+
+install(TARGETS iface EXPORT exp)
+install(EXPORT exp DESTINATION cmake)
diff --git a/Tests/RunCMake/TargetSources/RunCMakeTest.cmake b/Tests/RunCMake/TargetSources/RunCMakeTest.cmake
index c6d7f4332..1b4ef0bc1 100644
--- a/Tests/RunCMake/TargetSources/RunCMakeTest.cmake
+++ b/Tests/RunCMake/TargetSources/RunCMakeTest.cmake
@@ -9,3 +9,5 @@ endif()
 
 run_cmake(CMP0026-LOCATION)
 run_cmake(RelativePathInInterface)
+run_cmake(ExportBuild)
+run_cmake(ExportInstall)