diff --git a/mappings/net/minecraft/client/render/entity/MinecartEntityRenderer.mapping b/mappings/net/minecraft/client/render/entity/MinecartEntityRenderer.mapping
index a42bf2052a..ca23a751ad 100644
--- a/mappings/net/minecraft/client/render/entity/MinecartEntityRenderer.mapping
+++ b/mappings/net/minecraft/client/render/entity/MinecartEntityRenderer.mapping
@@ -2,5 +2,9 @@ CLASS net/minecraft/class_925 net/minecraft/client/render/entity/MinecartEntityR
 	FIELD field_4746 TEXTURE Lnet/minecraft/class_2960;
 	FIELD field_4747 model Lnet/minecraft/class_583;
 	METHOD method_4064 renderBlock (Lnet/minecraft/class_1688;FLnet/minecraft/class_2680;Lnet/minecraft/class_4587;Lnet/minecraft/class_4597;I)V
+		ARG 1 entity
 		ARG 2 delta
 		ARG 3 state
+		ARG 4 matrices
+		ARG 5 vertexConsumers
+		ARG 6 light
diff --git a/mappings/net/minecraft/client/render/entity/TntMinecartEntityRenderer.mapping b/mappings/net/minecraft/client/render/entity/TntMinecartEntityRenderer.mapping
index b10e5dbf99..49d28ff33a 100644
--- a/mappings/net/minecraft/client/render/entity/TntMinecartEntityRenderer.mapping
+++ b/mappings/net/minecraft/client/render/entity/TntMinecartEntityRenderer.mapping
@@ -1 +1,10 @@
 CLASS net/minecraft/class_957 net/minecraft/client/render/entity/TntMinecartEntityRenderer
+	METHOD method_23190 renderFlashingBlock (Lnet/minecraft/class_2680;Lnet/minecraft/class_4587;Lnet/minecraft/class_4597;IZ)V
+		COMMENT Renders a given block state into the given buffers either normally or with a bright white overlay.
+		COMMENT Used for rendering primed TNT either standalone or as part of a TNT minecart.
+		ARG 0 blockState
+		ARG 1 matrices
+		ARG 2 vertexConsumers
+		ARG 3 light
+		ARG 4 drawFlash
+			COMMENT whether a white semi-transparent overlay is added to the block to indicate the flash