diff --git a/debian/rules b/debian/rules
index de92adff..bbd183d6 100755
--- a/debian/rules
+++ b/debian/rules
@@ -383,7 +383,10 @@ override_dh_auto_configure: preconfigure
 	-DBOOTSTRAP_CMAKE_CXX_FLAGS='$(BOOTSTRAP_CXXFLAGS_EXTRA)' \
 	-DBOOTSTRAP_CMAKE_C_FLAGS='$(BOOTSTRAP_CFLAGS_EXTRA)' \
 	-DCLANG_BOOTSTRAP_PASSTHROUGH="CMAKE_INSTALL_PREFIX;CMAKE_VERBOSE_MAKEFILE;CMAKE_BUILD_TYPE;CMAKE_CXX_FLAGS_RELWITHDEBINFO;LLVM_LINK_LLVM_DYLIB;LLVM_INSTALL_UTILS;LLVM_VERSION_SUFFIX;LLVM_ENABLE_SPHINX;SPHINX_WARNINGS_AS_ERRORS;LLVM_BUILD_LLVM_DYLIB;LLVM_ENABLE_RTTI;LLVM_ENABLE_FFI;LIBCLANG_LIBRARY_VERSION;ENABLE_LINKER_BUILD_ID;POLLY_BUNDLED_JSONCPP;LLVM_EXPERIMENTAL_TARGETS_TO_BUILD;LLVM_USE_PERF;LLVM_ENABLE_ASSERTIONS;LLVM_BINUTILS_INCDIR;LLVM_HOST_TRIPLE;LLVM_COMPILER_CHECKED;COMPILER_RT_BUILD_BUILTINS;LIBOMP_LIBFLAGS;CMAKE_SHARED_LINKER_FLAGS;PYTHON_EXECUTABLE;LLVM_ENABLE_Z3_SOLVER"
-
+	FOUND_VERSION=`grep LLVM_VERSION_STRING build-llvm/include/llvm/Config/llvm-config.h|cut -d\" -f2`; \
+	if ! echo "$(LLVM_VERSION_FULL)"|grep "$$FOUND_VERSION"; then \
+		echo "mistmatch of version. Found: $$FOUND_VERSION / Expected: $(LLVM_VERSION_FULL)"; \
+	fi
 
 # make
 VERBOSE=VERBOSE=1