diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index 4ce688152d..b22e1b2342 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -199,11 +199,11 @@ public class ErekirTechTree{
                                 });
                                 node(heatRedirector, Seq.with(new OnSector(ravine)), () -> {
                                     node(electricHeater, Seq.with(new OnSector(ravine), new Research(afflict)), () -> {
-                                        node(slagHeater, Seq.with(tmpNever), () -> {
+                                        node(slagHeater, Seq.with(new OnSector(caldera)), () -> {
 
                                         });
 
-                                        node(atmosphericConcentrator, Seq.with(tmpNever), () -> {
+                                        node(atmosphericConcentrator, Seq.with(new OnSector(caldera)), () -> {
                                             node(cyanogenSynthesizer, Seq.with(tmpNever), () -> {
 
                                             });
@@ -268,7 +268,7 @@ public class ErekirTechTree{
                         });
                     });
 
-                    node(disperse, Seq.with(new OnSector(marsh)), () -> {
+                    node(disperse, Seq.with(tmpNever), () -> {
 
                     });
                 });
@@ -360,7 +360,9 @@ public class ErekirTechTree{
                             node(basin, Seq.with(new SectorComplete(atlas)), () -> {
                                 node(marsh, Seq.with(new SectorComplete(basin)), () ->{
                                     node(ravine, Seq.with(new SectorComplete(marsh), new Research(Liquids.slag)), () ->{
+                                        node(caldera, Seq.with(new SectorComplete(peaks), new Research(heatRedirector)), () -> {
 
+                                        });
                                     });
 
                                     node(peaks, Seq.with(new SectorComplete(marsh), new SectorComplete(split)), () ->{