diff --git a/libmisc/LineInfo.cc b/libmisc/LineInfo.cc
index 753b24970..c0daaff14 100644
--- a/libmisc/LineInfo.cc
+++ b/libmisc/LineInfo.cc
@@ -27,6 +27,11 @@ LineInfo::LineInfo()
 {
 }
 
+LineInfo::LineInfo(const LineInfo&that) :
+    file_(that.file_), lineno_(that.lineno_)
+{
+}
+
 LineInfo::~LineInfo()
 {
 }
diff --git a/libmisc/LineInfo.h b/libmisc/LineInfo.h
index b212bc959..4d4c6beda 100644
--- a/libmisc/LineInfo.h
+++ b/libmisc/LineInfo.h
@@ -36,6 +36,7 @@ using namespace std;
 class LineInfo {
     public:
       LineInfo();
+      LineInfo(const LineInfo&that);
       virtual ~LineInfo();
 
 	// Get a fully formatted file/lineno
diff --git a/vhdlpp/expression.cc b/vhdlpp/expression.cc
index 77d80a4d6..949d568ae 100644
--- a/vhdlpp/expression.cc
+++ b/vhdlpp/expression.cc
@@ -311,6 +311,7 @@ ExpConditional::else_t::else_t(Expression*cond, std::list<Expression*>*tru)
 }
 
 ExpConditional::else_t::else_t(const else_t&other)
+: LineInfo(other)
 {
       cond_ = other.cond_->clone();
       for(std::list<Expression*>::const_iterator it = other.true_clause_.begin();