diff --git a/src/gpu/VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.cu b/src/gpu/VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.cu
index 42e45a5bb83d41e74e88378da60b142509e09bc9..2be8743bb28e45234533cb63673a9aebd6b0cf10 100644
--- a/src/gpu/VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.cu
+++ b/src/gpu/VirtualFluids_GPU/PreCollisionInteractor/Probes/Probe.cu
@@ -389,7 +389,7 @@ std::string Probe::makeGridFileName(int level, int id, int t, uint part)
 {
     return this->probeName + "_bin" + nameComponent<int>("lev", level)
                                     + nameComponent<int>("ID", id)
-                                    + nameComponent<int>("part", part)
+                                    + nameComponent<int>("Part", part)
                                     + nameComponent<int>("t", t) + ".vtk";
 }
 
@@ -597,4 +597,4 @@ std::vector<std::string> Probe::getVarNames()
         }
     }
     return varNames;
-}
\ No newline at end of file
+}