diff --git a/pynestml/codegeneration/nest_code_generator.py b/pynestml/codegeneration/nest_code_generator.py
index ff3a00fd1..aa2d68f73 100644
--- a/pynestml/codegeneration/nest_code_generator.py
+++ b/pynestml/codegeneration/nest_code_generator.py
@@ -234,8 +234,8 @@ def setup_printers(self):
             self._gsl_function_call_printer = NESTGSLFunctionCallPrinter(None)
 
         self._gsl_printer = CppExpressionPrinter(simple_expression_printer=CppSimpleExpressionPrinter(variable_printer=self._gsl_variable_printer,
-                                                                                                              constant_printer=self._constant_printer,
-                                                                                                              function_call_printer=self._gsl_function_call_printer))
+                                                                                                      constant_printer=self._constant_printer,
+                                                                                                      function_call_printer=self._gsl_function_call_printer))
         self._gsl_function_call_printer._expression_printer = self._gsl_printer
 
         # ODE-toolbox printers
diff --git a/pynestml/codegeneration/nest_compartmental_code_generator.py b/pynestml/codegeneration/nest_compartmental_code_generator.py
index 5d2cdb4f7..179f3062e 100644
--- a/pynestml/codegeneration/nest_compartmental_code_generator.py
+++ b/pynestml/codegeneration/nest_compartmental_code_generator.py
@@ -172,8 +172,8 @@ def setup_printers(self):
 
         self._gsl_printer = CppExpressionPrinter(
             simple_expression_printer=CppSimpleExpressionPrinter(variable_printer=self._gsl_variable_printer,
-                                                                         constant_printer=self._constant_printer,
-                                                                         function_call_printer=self._gsl_function_call_printer))
+                                                                 constant_printer=self._constant_printer,
+                                                                 function_call_printer=self._gsl_function_call_printer))
         self._gsl_function_call_printer._expression_printer = self._gsl_printer
 
         # ODE-toolbox printers
diff --git a/pynestml/codegeneration/spinnaker_code_generator.py b/pynestml/codegeneration/spinnaker_code_generator.py
index 9877375ab..ba47f8c14 100644
--- a/pynestml/codegeneration/spinnaker_code_generator.py
+++ b/pynestml/codegeneration/spinnaker_code_generator.py
@@ -85,8 +85,8 @@ def setup_printers(self):
 
         self._gsl_printer = CppExpressionPrinter(
             simple_expression_printer=CSimpleExpressionPrinter(variable_printer=self._gsl_variable_printer,
-                                                                       constant_printer=self._constant_printer,
-                                                                       function_call_printer=self._gsl_function_call_printer))
+                                                               constant_printer=self._constant_printer,
+                                                               function_call_printer=self._gsl_function_call_printer))
         self._gsl_function_call_printer._expression_printer = self._gsl_printer
 
         # ODE-toolbox printers