diff --git a/src/main/java/li/cil/oc2/client/renderer/tileentity/ComputerTileEntityRenderer.java b/src/main/java/li/cil/oc2/client/renderer/tileentity/ComputerTileEntityRenderer.java
index b43caf0d..880fef0e 100644
--- a/src/main/java/li/cil/oc2/client/renderer/tileentity/ComputerTileEntityRenderer.java
+++ b/src/main/java/li/cil/oc2/client/renderer/tileentity/ComputerTileEntityRenderer.java
@@ -1,7 +1,7 @@
 package li.cil.oc2.client.renderer.tileentity;
 
 import com.mojang.blaze3d.matrix.MatrixStack;
-import com.mojang.blaze3d.platform.GlStateManager;
+import com.mojang.blaze3d.systems.RenderSystem;
 import com.mojang.blaze3d.vertex.IVertexBuilder;
 import li.cil.oc2.api.API;
 import li.cil.oc2.client.renderer.CustomRenderType;
@@ -134,9 +134,9 @@ public final class ComputerTileEntityRenderer extends TileEntityRenderer<Compute
             stack.scale(scale, scale, 1f);
 
             // TODO Make terminal renderer use buffer+rendertype.
-            GlStateManager._enableBlend();
-            GlStateManager._enableDepthTest();
-            GlStateManager._depthMask(false);
+            RenderSystem.enableBlend();
+            RenderSystem.enableDepthTest();
+            RenderSystem.depthMask(false);
             terminal.render(stack);
 
             stack.popPose();
diff --git a/src/main/java/li/cil/oc2/common/vm/Terminal.java b/src/main/java/li/cil/oc2/common/vm/Terminal.java
index 1f52ff78..e415a132 100644
--- a/src/main/java/li/cil/oc2/common/vm/Terminal.java
+++ b/src/main/java/li/cil/oc2/common/vm/Terminal.java
@@ -1,7 +1,6 @@
 package li.cil.oc2.common.vm;
 
 import com.mojang.blaze3d.matrix.MatrixStack;
-import com.mojang.blaze3d.platform.GlStateManager;
 import com.mojang.blaze3d.systems.RenderSystem;
 import it.unimi.dsi.fastutil.bytes.ByteArrayFIFOQueue;
 import li.cil.ceres.api.Serialized;
@@ -552,7 +551,7 @@ public final class Terminal {
         ///////////////////////////////////////////////////////////////
 
         private void renderBuffer() {
-            GlStateManager._depthMask(false);
+            RenderSystem.depthMask(false);
             Minecraft.getInstance().getTextureManager().bind(LOCATION_FONT_TEXTURE);
 
             final BufferBuilder buffer = Tessellator.getInstance().getBuilder();
@@ -563,7 +562,7 @@ public final class Terminal {
                 WorldVertexBufferUploader.end(buffer);
             }
 
-            GlStateManager._depthMask(true);
+            RenderSystem.depthMask(true);
         }
 
         private void validateLineCache(final AtomicInteger dirty, final MatrixStack stack) {
@@ -714,7 +713,7 @@ public final class Terminal {
                 return;
             }
 
-            GlStateManager._depthMask(false);
+            RenderSystem.depthMask(false);
             RenderSystem.disableTexture();
 
             stack.pushPose();
@@ -740,7 +739,7 @@ public final class Terminal {
             stack.popPose();
 
             RenderSystem.enableTexture();
-            GlStateManager._depthMask(true);
+            RenderSystem.depthMask(true);
         }
 
         private static boolean isPrintableCharacter(final char ch) {