diff --git a/mods/CORE/mcl_explosions/init.lua b/mods/CORE/mcl_explosions/init.lua
index 379d5700..79221d0e 100644
--- a/mods/CORE/mcl_explosions/init.lua
+++ b/mods/CORE/mcl_explosions/init.lua
@@ -202,7 +202,10 @@ local function trace_explode(pos, strength, raydirs, radius, info, puncher)
 						npos_x - emin_x + 1
 
 				local cid = data[idx]
-				local br = node_blastres[cid]
+
+				-- Set blast resistance to 0 for unknown nodes
+				local br = node_blastres[cid] or 0
+
 				if br < INDESTRUCT_BLASTRES and br > max_blast_resistance then
 					br = max_blast_resistance
 				end