diff --git a/src/microbe_stage/compounds.cpp b/src/microbe_stage/compounds.cpp
index dfb3eacbda7..4a8189b0cfc 100644
--- a/src/microbe_stage/compounds.cpp
+++ b/src/microbe_stage/compounds.cpp
@@ -10,7 +10,7 @@ Compound::Compound(Json::Value value)
     volume = value["volume"].asDouble();
     isCloud = value["isCloud"].asBool();
     isUseful = value["isUseful"].asBool();
-
+    isEnvironmental = value["isEnvironmental"].asBool();
     // Setting the cloud colour.
     float r = value["colour"]["r"].asFloat();
     float g = value["colour"]["g"].asFloat();
diff --git a/src/microbe_stage/compounds.h b/src/microbe_stage/compounds.h
index 7cd8384b4d6..2e2c83eff4f 100644
--- a/src/microbe_stage/compounds.h
+++ b/src/microbe_stage/compounds.h
@@ -11,6 +11,7 @@ class Compound : public RegistryType {
     double volume = 1.0;
     bool isCloud = false;
     bool isUseful = false;
+    bool isEnvironmental = false;
     Ogre::ColourValue colour;
 
     Compound();
diff --git a/src/scripting/script_initializer.cpp b/src/scripting/script_initializer.cpp
index 825947beb53..2eec1d0153c 100644
--- a/src/scripting/script_initializer.cpp
+++ b/src/scripting/script_initializer.cpp
@@ -211,6 +211,11 @@ bool
         ANGELSCRIPT_REGISTERFAIL;
     }
 
+    if(engine->RegisterObjectProperty(
+           "Compound", "bool isEnvironmental", asOFFSET(Compound, isEnvironmental)) < 0) {
+        ANGELSCRIPT_REGISTERFAIL;
+    }
+
     if(engine->RegisterObjectProperty("Compound", "Ogre::ColourValue colour",
            asOFFSET(Compound, colour)) < 0) {
         ANGELSCRIPT_REGISTERFAIL;