diff --git a/DDCore/include/DD4hep/GrammarParsed.h b/DDCore/include/DD4hep/GrammarParsed.h
index 95785c6479b1453bc735275d2e10481d5fd42af6..ebf2e6059580a563d602368d5957ec64e9465478 100644
--- a/DDCore/include/DD4hep/GrammarParsed.h
+++ b/DDCore/include/DD4hep/GrammarParsed.h
@@ -22,7 +22,7 @@
 #define DD4HEP_GRAMMARPARSED_H
 
 #if defined(DD4HEP_GRAMMARUNPARSED_H)
-#pragma error "The header files GrammarParsed.h and GrammarUnparsed.h may not be included in the same compilation unit!"
+#error "The header files GrammarParsed.h and GrammarUnparsed.h may not be included in the same compilation unit!"
 #endif
 
 /// Framework include files
diff --git a/DDCore/include/DD4hep/GrammarUnparsed.h b/DDCore/include/DD4hep/GrammarUnparsed.h
index 68036d2928b31c39079a97d80e64dd685d501d97..aa0a53362d184f40dc7e1170d8b8c2530767cc4e 100644
--- a/DDCore/include/DD4hep/GrammarUnparsed.h
+++ b/DDCore/include/DD4hep/GrammarUnparsed.h
@@ -22,7 +22,7 @@
 #define DD4HEP_GRAMMARUNPARSED_H
 
 #if defined(DD4HEP_GRAMMARPARSED_H)
-#pragma error "The header files GrammarParsed.h and GrammarUnparsed.h may not be included in the same compilation unit!"
+#error "The header files GrammarParsed.h and GrammarUnparsed.h may not be included in the same compilation unit!"
 #endif
 
 // Framework include files
diff --git a/DDTest/CMakeLists.txt b/DDTest/CMakeLists.txt
index d12761d7f514f6749fdf77fcb93ccb1709a5138f..aa6d658f2dacea2f3f8d087e6b9750c891884eb3 100644
--- a/DDTest/CMakeLists.txt
+++ b/DDTest/CMakeLists.txt
@@ -96,3 +96,19 @@ if (DD4HEP_USE_GEANT4)
 
 endif()
 install(DIRECTORY include/DD4hep DESTINATION include)
+
+
+# Test that GrammarUnparsed and GrammarParsed fail to be compiled
+add_executable(test_failToCompile src/test_failToCompileGrammar.cc)
+target_link_libraries(test_failToCompile DD4hep::DDCore)
+# Avoid building these targets normally
+set_target_properties(test_failToCompile PROPERTIES
+  EXCLUDE_FROM_ALL TRUE
+  EXCLUDE_FROM_DEFAULT_BUILD TRUE)
+
+add_test(NAME TestFailToCompile
+  COMMAND ${CMAKE_COMMAND} --build . --target test_failToCompile --config $<CONFIGURATION>
+  WORKING_DIRECTORY ${CMAKE_BINARY_DIR})
+set_tests_properties(TestFailToCompile
+  PROPERTIES
+  PASS_REGULAR_EXPRESSION "The header files GrammarParsed.h and GrammarUnparsed.h may not be included in the same compilation unit")
diff --git a/DDTest/src/test_failToCompileGrammar.cc b/DDTest/src/test_failToCompileGrammar.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2b1f2022c696fa616e0a9e9e82ade8c1bfac8950
--- /dev/null
+++ b/DDTest/src/test_failToCompileGrammar.cc
@@ -0,0 +1,8 @@
+#include <DD4hep/GrammarParsed.h>
+#include <DD4hep/GrammarUnparsed.h>
+
+
+int main ()
+{
+  return 0;
+}