diff --git a/emper/Common.hpp b/emper/Common.hpp
index a93a8017f246fd27382d34deed789c0123d59d1f..46ca33d721e9a592ac71a61ffd05e4f413809b97 100644
--- a/emper/Common.hpp
+++ b/emper/Common.hpp
@@ -9,8 +9,8 @@ typedef std::function<void(void)> func_t;
 #define STRINGIFY(x) #x
 #define TOSTRING(x) STRINGIFY(x)
 #define DIE die(__FILE__ ":" TOSTRING(__LINE__), false)
-#define DIE_MSG(x) die(__FILE__ ":" TOSTRING(__LINE__) "-" #x, false)
-#define DIE_MSG_ERRNO(x) die(__FILE__ ":" TOSTRING(__LINE__) "-" #x, true)
+#define DIE_MSG(x) die(__FILE__ ":" TOSTRING(__LINE__) " " #x, false)
+#define DIE_MSG_ERRNO(x) die(__FILE__ ":" TOSTRING(__LINE__) " " #x, true)
 
 #define likely(x)       __builtin_expect(!!(x),1)
 #define unlikely(x)     __builtin_expect(!!(x),0)