diff --git a/inst/cta/src/GCTAAeff2D.cpp b/inst/cta/src/GCTAAeff2D.cpp
index f25248f..3d1ad9c 100644
--- a/inst/cta/src/GCTAAeff2D.cpp
+++ b/inst/cta/src/GCTAAeff2D.cpp
@@ -342,6 +342,9 @@ void GCTAAeff2D::load(const std::string& filename)
     // Close FITS file
     file.close();
 
+    // Store filename
+    m_filename = filename;
+
     // Return
     return;
 }
diff --git a/inst/cta/src/GCTAAeffArf.cpp b/inst/cta/src/GCTAAeffArf.cpp
index 1ab5258..b388b34 100644
--- a/inst/cta/src/GCTAAeffArf.cpp
+++ b/inst/cta/src/GCTAAeffArf.cpp
@@ -267,6 +267,9 @@ void GCTAAeffArf::load(const std::string& filename)
     // Close FITS file
     file.close();
 
+    // Store filename
+    m_filename = filename;
+
     // Return
     return;
 }
diff --git a/inst/cta/src/GCTABackground3D.cpp b/inst/cta/src/GCTABackground3D.cpp
index 4887f3f..b30649d 100644
--- a/inst/cta/src/GCTABackground3D.cpp
+++ b/inst/cta/src/GCTABackground3D.cpp
@@ -408,6 +408,9 @@ void GCTABackground3D::load(const std::string& filename)
     // Close FITS file
     file.close();
 
+    // Store filename
+    m_filename = filename;
+
     // Return
     return;
 }
diff --git a/inst/cta/src/GCTAEdisp2D.cpp b/inst/cta/src/GCTAEdisp2D.cpp
index 9502890..7018248 100644
--- a/inst/cta/src/GCTAEdisp2D.cpp
+++ b/inst/cta/src/GCTAEdisp2D.cpp
@@ -259,6 +259,9 @@ void GCTAEdisp2D::load(const std::string& filename)
     // Close FITS file
     file.close();
 
+    // Store filename
+    m_filename = filename;
+
     // Return
     return;
 }
diff --git a/inst/cta/src/GCTAPsf2D.cpp b/inst/cta/src/GCTAPsf2D.cpp
index 2470243..1be3159 100644
--- a/inst/cta/src/GCTAPsf2D.cpp
+++ b/inst/cta/src/GCTAPsf2D.cpp
@@ -383,6 +383,9 @@ void GCTAPsf2D::load(const std::string& filename)
     // Close FITS file
     file.close();
 
+    // Store filename
+    m_filename = filename;
+
     // Return
     return;
 }
diff --git a/inst/cta/src/GCTAPsfKing.cpp b/inst/cta/src/GCTAPsfKing.cpp
index c722018..b4d55e5 100644
--- a/inst/cta/src/GCTAPsfKing.cpp
+++ b/inst/cta/src/GCTAPsfKing.cpp
@@ -375,6 +375,9 @@ void GCTAPsfKing::load(const std::string& filename)
     // Close FITS file
     file.close();
 
+    // Store filename
+    m_filename = filename;
+
     // Return
     return;
 }
diff --git a/inst/cta/src/GCTAPsfVector.cpp b/inst/cta/src/GCTAPsfVector.cpp
index 7de99e6..7bb6b07 100644
--- a/inst/cta/src/GCTAPsfVector.cpp
+++ b/inst/cta/src/GCTAPsfVector.cpp
@@ -276,6 +276,9 @@ void GCTAPsfVector::load(const std::string& filename)
     // Close FITS file
     file.close();
 
+    // Store filename
+    m_filename = filename;
+
     // Return
     return;
 }