diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 9e2ea7800a..ce8fdebc4b 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -858,8 +858,11 @@ void cmGlobalGenerator::EnableLanguage(
       this->SetLanguageEnabled("NONE", mf);
       continue;
     }
-    std::string loadedLang = cmStrCat("CMAKE_", lang, "_COMPILER_LOADED");
-    if (!mf->GetDefinition(loadedLang)) {
+    // Compiler information may have already been detected and saved.
+    // Load it if we have not enabled the language anywhere yet, or
+    // if we have not loaded compiler information in this directory.
+    if (!this->GetLanguageEnabled(lang) ||
+        !mf->GetDefinition(cmStrCat("CMAKE_", lang, "_COMPILER_LOADED"))) {
       fpath = cmStrCat(rootBin, "/CMake", lang, "Compiler.cmake");
 
       // If the existing build tree was already configured with this
diff --git a/Tests/RunCMake/ToolchainFile/RunCMakeTest.cmake b/Tests/RunCMake/ToolchainFile/RunCMakeTest.cmake
index b588ce03d1..5105e7afa9 100644
--- a/Tests/RunCMake/ToolchainFile/RunCMakeTest.cmake
+++ b/Tests/RunCMake/ToolchainFile/RunCMakeTest.cmake
@@ -14,6 +14,7 @@ run_cmake_toolchain(LinkFlagsInit)
 run_cmake_toolchain(CMP0126-NEW)
 run_cmake_toolchain(CMP0126-OLD)
 run_cmake_toolchain(CMP0126-WARN)
+run_cmake_toolchain(SetCompilerLoaded)
 run_cmake_toolchain(SetCrossCompiling)
 
 function(run_IncludeDirectories)
diff --git a/Tests/RunCMake/ToolchainFile/SetCompilerLoaded-toolchain.cmake b/Tests/RunCMake/ToolchainFile/SetCompilerLoaded-toolchain.cmake
new file mode 100644
index 0000000000..b127236eaa
--- /dev/null
+++ b/Tests/RunCMake/ToolchainFile/SetCompilerLoaded-toolchain.cmake
@@ -0,0 +1 @@
+set(CMAKE_C_COMPILER_LOADED 1)
diff --git a/Tests/RunCMake/ToolchainFile/SetCompilerLoaded.cmake b/Tests/RunCMake/ToolchainFile/SetCompilerLoaded.cmake
new file mode 100644
index 0000000000..e731cbc29e
--- /dev/null
+++ b/Tests/RunCMake/ToolchainFile/SetCompilerLoaded.cmake
@@ -0,0 +1,5 @@
+enable_language(C)
+try_compile(SHOULD_PASS SOURCE_FROM_CONTENT "main.c" "int main(void) { return 0; }")
+if(NOT SHOULD_PASS)
+  message(FATAL_ERROR "try_compile failed but should have passed!")
+endif()