diff --git a/src/programmable_signals.cpp b/src/programmable_signals.cpp
index 04b31b2f4a..a8c18d7029 100644
--- a/src/programmable_signals.cpp
+++ b/src/programmable_signals.cpp
@@ -31,7 +31,6 @@ SignalProgram::SignalProgram(TileIndex tile, Track track, bool raw)
 
 SignalProgram::~SignalProgram()
 {
-	this->DebugPrintProgram();
 	this->first_instruction->Remove();
 	delete this->first_instruction;
 	delete this->last_instruction;
diff --git a/src/saveload/signal_sl.cpp b/src/saveload/signal_sl.cpp
index 7f2890d26b..241229b5d5 100644
--- a/src/saveload/signal_sl.cpp
+++ b/src/saveload/signal_sl.cpp
@@ -151,8 +151,6 @@ static void Save_SPRG()
 			i != e; ++i) {
 		SignalProgram *prog = i->second;
 
-		prog->DebugPrintProgram();
-
 		WriteVLI(b, prog->tile);
 		WriteVLI(b, prog->track);
 		WriteVLI(b, prog->instructions.size());
@@ -307,7 +305,6 @@ static void Load_SPRG()
 		}
 
 		DoFixups(l, sp->instructions);
-		sp->DebugPrintProgram();
 	}
 }