diff --git a/src/map/projection.cpp b/src/map/projection.cpp
index 6ab98079..7afb4a3b 100644
--- a/src/map/projection.cpp
+++ b/src/map/projection.cpp
@@ -128,6 +128,8 @@ Projection::~Projection()
 
 Projection &Projection::operator=(const Projection &p)
 {
+	delete _ct;
+
 	_gcs = p._gcs;
 	_units = p._units;
 	_ct = p._ct ? p._ct->clone() : 0;