diff --git a/src/simulation/Simulation.cpp b/src/simulation/Simulation.cpp
index 17bbc9bc2..d0b42bcc2 100644
--- a/src/simulation/Simulation.cpp
+++ b/src/simulation/Simulation.cpp
@@ -2544,6 +2544,11 @@ int Simulation::create_part(int p, int x, int y, int tv)//the function for creat
 			return -1;
 		if (parts[pmap[y][x]>>8].life!=0)
 			return -1;
+		if (p==-2 && (pmap[y][x]&0xFF)==PT_INST)
+		{
+			FloodINST(x, y, PT_SPRK, PT_INST);
+			return pmap[y][x]>>8;
+		}
 		parts[pmap[y][x]>>8].type = PT_SPRK;
 		parts[pmap[y][x]>>8].life = 4;
 		parts[pmap[y][x]>>8].ctype = pmap[y][x]&0xFF;