diff --git a/converter.py b/converter.py
index 4b2f6d0..9e98e6a 100644
--- a/converter.py
+++ b/converter.py
@@ -18,6 +18,7 @@ class System:
         substitutions: list[tuple[str, str]],
         interpretations: list[tuple[str, str]],
     ):
+        # Space trimming for class members
         self.name = name.strip()
         """System name"""
 
@@ -74,6 +75,9 @@ class System:
         for member, interpretation in self.interpretations:
             inter_element = XMLSubElement(interpretations, "interpretation")
             inter_element.set("member", member)
+            # If the interpretation is "do nothing", then do nothing
+            if len(interpretation) == 0:
+                interpretation = "TURN 0"
             inter_element.text = interpretation
 
         return system
diff --git a/l-systems.csv b/l-systems.csv
index 9bfcb77..f30cd51 100644
--- a/l-systems.csv
+++ b/l-systems.csv
@@ -22,4 +22,4 @@ peano,FAPM,PFA,F,AMFMFAPFPFAPFPFAPFPFAMFMFAMFMFAMFMFAPFPFA,P,M,LINE 10,LINE 10,T
 pyramid,FPM,FPPFPPFPPPFMMFMMF,FFPPFPPFPPFFF,P,M,LINE 10,TURN 60,TURN -60
 levey,FPM,FPPFPPFPPF,MFPPFM,P,M,LINE 10,TURN 45,TURN -45
 carpet,FAPM,F,FPFMFMFMAPFPFPFMF,AAA,P,M,LINE 10,MOVE 10,TURN 90,TURN -90
-square,FXPM,FPXFPFPXF,F,XFMFPFMXFPFPXFMFPFMX,P,M,LINE 10,TURN 0,TURN 90,TURN -90
+square,FXPM,FPXFPFPXF,F,XFMFPFMXFPFPXFMFPFMX,P,M,LINE 10,,TURN 90,TURN -90