diff --git a/inst/cta/src/GCTACubeBackground.cpp b/inst/cta/src/GCTACubeBackground.cpp
index c3dc7cc..5fb5d64 100644
--- a/inst/cta/src/GCTACubeBackground.cpp
+++ b/inst/cta/src/GCTACubeBackground.cpp
@@ -300,7 +300,7 @@ void GCTACubeBackground::fill(const GObservations& obs, GLog* log)
         }
 
         // Skip observation if we have a binned observation
-        if (obs->eventtype() == "CountsCube") {
+        if (cta->eventtype() == "CountsCube") {
             if (log != NULL) {
                 *log << "Warning: Skipping binned observation ";
                 *log << "\"" << cta->name() << "\"" <<std::endl;
diff --git a/inst/cta/src/GCTACubeExposure.cpp b/inst/cta/src/GCTACubeExposure.cpp
index bd656e4..e42ba67 100644
--- a/inst/cta/src/GCTACubeExposure.cpp
+++ b/inst/cta/src/GCTACubeExposure.cpp
@@ -396,7 +396,7 @@ void GCTACubeExposure::fill(const GObservations& obs, GLog* log)
         }
 
         // Skip observation if we have a binned observation
-        if (obs->eventtype() == "CountsCube") {
+        if (cta->eventtype() == "CountsCube") {
             if (log != NULL) {
                 *log << "Warning: Skipping binned observation ";
                 *log << "\"" << cta->name() << "\"" <<std::endl;
diff --git a/inst/cta/src/GCTACubePsf.cpp b/inst/cta/src/GCTACubePsf.cpp
index 342e965..79a46ad 100644
--- a/inst/cta/src/GCTACubePsf.cpp
+++ b/inst/cta/src/GCTACubePsf.cpp
@@ -461,7 +461,7 @@ void GCTACubePsf::fill(const GObservations& obs, GLog* log)
         }
 
         // Skip observation if we have a binned observation
-        if (obs->eventtype() == "CountsCube") {
+        if (cta->eventtype() == "CountsCube") {
             if (log != NULL) {
                 *log << "Warning: Skipping binned observation ";
                 *log << "\"" << cta->name() << "\"" <<std::endl;