diff --git a/bopytex/default_config.py b/bopytex/default_config.py
index 4619b82..a4444d5 100644
--- a/bopytex/default_config.py
+++ b/bopytex/default_config.py
@@ -1,6 +1,6 @@
-#import jinja2 as j2
 from bopytex.planner.generate_compile_join_planner import planner
 from bopytex.worker import Dispatcher
+from bopytex.worker.activate_corr import activate_corr
 from bopytex.worker.clean import clean
 from bopytex.worker.compile import pdflatex
 from bopytex.worker.generate import generate
@@ -8,12 +8,19 @@ from bopytex.worker.join_pdf import pdfjam
 from bopytex.jinja2_env.texenv import texenv
 
 jinja2 = {
-    # "environment": j2.Environment(loader=j2.FileSystemLoader("./")),
     "environment": texenv
 }
 
-dispatcher = Dispatcher(
-    {"GENERATE": generate, "COMPILE": pdflatex, "JOIN": pdfjam, "CLEAN": clean}
-)
+dispatcher = Dispatcher({
+    "GENERATE": generate,
+    "COMPILE": pdflatex,
+    "JOIN": pdfjam,
+    "CLEAN": clean,
+    "ACTIVATE_CORR": activate_corr,
+    })
 
+latex = {
+        "solution": r"solution/print = true",
+        "no_solution": r"solution/print = false",
+        }
 
diff --git a/bopytex/planner/activate_corr_compile_join_planner.py b/bopytex/planner/activate_corr_compile_join_planner.py
index a67c20f..0e84e68 100644
--- a/bopytex/planner/activate_corr_compile_join_planner.py
+++ b/bopytex/planner/activate_corr_compile_join_planner.py
@@ -1,4 +1,4 @@
-from bopytex.tasks import Task, activate_corr_on, compile_pdf, generate, join_pdfs
+from bopytex.tasks import Task, activate_corr_on, compile_pdf, join_pdfs
 import bopytex.planner.naming as naming
 import os
 
diff --git a/bopytex/planner/generate_compile_join_planner.py b/bopytex/planner/generate_compile_join_planner.py
index 8fd2ad2..27104c8 100644
--- a/bopytex/planner/generate_compile_join_planner.py
+++ b/bopytex/planner/generate_compile_join_planner.py
@@ -80,7 +80,7 @@ def tasks_builder(
 
         if corr:
             corr_source = naming.corr(source)
-            tasks.append(activate_corr_on(source, corr_source))
+            tasks.append(activate_corr_on(source, opt, corr_source))
 
             if not no_pdf:
                 corr_pdf = naming.source2pdf(corr_source)
diff --git a/bopytex/tasks.py b/bopytex/tasks.py
index 5244f20..d0f3287 100644
--- a/bopytex/tasks.py
+++ b/bopytex/tasks.py
@@ -24,11 +24,11 @@ def generate(template: str, meta: dict, output: str):
     )
 
 
-def activate_corr_on(src: str, output: str):
+def activate_corr_on(src: str, meta:dict, output: str):
     """Create a task to activate correction for src"""
     return Task(
         action="ACTIVATE_CORR",
-        args={},
+        args=meta,
         deps=[src],
         output=output,
     )
diff --git a/bopytex/worker/activate_corr.py b/bopytex/worker/activate_corr.py
new file mode 100644
index 0000000..3f300a2
--- /dev/null
+++ b/bopytex/worker/activate_corr.py
@@ -0,0 +1,14 @@
+from bopytex.message import Message
+
+
+def activate_corr(args, deps, output):
+    no_solution = args["latex"]["no_solution"]
+    solution = args["latex"]["solution"]
+
+    with open(deps[0], "r") as input_f:
+        with open(output, "w") as output_f:
+            for line in input_f.readlines():
+                output_f.write(line.replace(no_solution, solution))
+
+    return Message(0, [f"ACTIVATE CORR - {deps[0]} to {output}"], [])
+
diff --git a/example/usecase/joined_example.pdf b/example/usecase/joined_example.pdf
index 1200dcd..fb2fd5d 100644
Binary files a/example/usecase/joined_example.pdf and b/example/usecase/joined_example.pdf differ
diff --git a/example/usecase/tpl_example.tex b/example/usecase/tpl_example.tex
index 48b3339..d5a90bc 100644
--- a/example/usecase/tpl_example.tex
+++ b/example/usecase/tpl_example.tex
@@ -4,6 +4,8 @@
 
 \title{Bopytex with Mapytex example -- \Var{ number }}
 
+% solution/print = false
+
 \begin{document}
 
 \maketitle