diff --git a/main.cpp b/main.cpp
index be4577e..4f74ac2 100644
--- a/main.cpp
+++ b/main.cpp
@@ -34,8 +34,14 @@ int main(int argc, char *argv[])
 {
 	openEMS FDTD;
 
+#ifdef _LP64
+	string bits = "64bit";
+#else
+	string bits = "32bit";
+#endif
+
 	cout << " -------------------------------------------------------------------- " << endl;
-	cout << " | openEMS version " GIT_VERSION << endl;
+	cout << " | openEMS " << bits << " -- version " GIT_VERSION << endl;
 	cout << " | (C) 2010 Thorsten Liebig <thorsten.liebig@gmx.de>  GPL license" << endl;
 	cout << " -------------------------------------------------------------------- " << endl;
 	cout << openEMS::GetExtLibsInfo() << endl;
diff --git a/openems.cpp b/openems.cpp
index 929141e..e54683e 100644
--- a/openems.cpp
+++ b/openems.cpp
@@ -32,6 +32,7 @@
 #include "FDTD/processfields_td.h"
 #include <sys/time.h>
 #include <time.h>
+#include <H5Cpp.h> // only for H5get_libversion()
 
 #include "FDTD/operator_ext_lorentzmaterial.h"
 
@@ -168,6 +169,14 @@ string openEMS::GetExtLibsInfo()
 	str << "\tUsed external libraries:" << endl;
 	str << "\t\t" << ContinuousStructure::GetInfoLine(true) << endl;
 
+	// libhdf5
+	unsigned int major, minor, release;
+	if (H5get_libversion( &major, &minor, &release ) >= 0)
+	{
+		str << "\t\t" << "hdf5   -- Version: " << major << '.' << minor << '.' << release << endl;
+		str << "\t\t" << "          compiled against: " H5_VERS_INFO << endl;
+	}
+
 	return str.str();
 }