diff --git a/src/gui/game/PropertyTool.cpp b/src/gui/game/PropertyTool.cpp
index aff535e39..6c9bf264b 100644
--- a/src/gui/game/PropertyTool.cpp
+++ b/src/gui/game/PropertyTool.cpp
@@ -139,6 +139,11 @@ void PropertyWindow::SetProperty()
 								buffer.exceptions(std::stringstream::failbit | std::stringstream::badbit);
 								buffer >> tempInt;
 							}
+							if (property->GetOption().first == "type" && (tempInt < 0 || tempInt >= PT_NUM))
+							{
+								new ErrorMessage("Could not set property", "Invalid Particle Type");
+								return;
+							}
 						}
 						else
 						{
@@ -193,6 +198,7 @@ void PropertyWindow::SetProperty()
 					break;
 				default:
 					new ErrorMessage("Could not set property", "Invalid property");
+					return;
 			}
 			sim->flood_prop(
 							position.X,