diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6e93c18c7fcdec694dfaa765b391438c5691ec38..6b507025954e3655b0d741eea7a7d54abc24dbc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 # Unreleased
 ### Added
+- Enable the possibility of having different normalisation factors for the star formation history. (Médéric Boquien)
+
 ### Changed
 - The way to indicate the fluxes in the input table has changed because there
     was bugs in the way upper limits were handled. Here are the new rules:
diff --git a/pcigale/sed_modules/sfh2exp.py b/pcigale/sed_modules/sfh2exp.py
index d51687796f4b8d003b5dfa3e909baedee45898a7..502440b957b3d4886198ca61baa0e3b199f342ed 100644
--- a/pcigale/sed_modules/sfh2exp.py
+++ b/pcigale/sed_modules/sfh2exp.py
@@ -55,7 +55,7 @@ class Sfh2Exp(SedModule):
             20
         )),
         ("sfr_0", (
-            "float(min=0)",
+            "cigale_list(minvalue=0.)",
             "Value of SFR at t = 0 in M_sun/yr.",
             1.
         )),
diff --git a/pcigale/sed_modules/sfhdelayed.py b/pcigale/sed_modules/sfhdelayed.py
index 2f51629b37c3c78c292c550a34a1b889a895cc3f..b1a0557eb65dedae34f5e2cbd5435e3118e1cde3 100644
--- a/pcigale/sed_modules/sfhdelayed.py
+++ b/pcigale/sed_modules/sfhdelayed.py
@@ -41,7 +41,7 @@ class SFHDelayed(SedModule):
             5000
         )),
         ("sfr_A", (
-            "float(min=0.)",
+            "cigale_list(minvalue=0.)",
             "Multiplicative factor controlling the amplitude of SFR.",
             1.
         )),
diff --git a/pcigale/sed_modules/sfhperiodic.py b/pcigale/sed_modules/sfhperiodic.py
index ba323abe38cbe7dd90ce0f15700391f2ee270863..385a74da161b21c7250812a93c29c57c65a3413a 100644
--- a/pcigale/sed_modules/sfhperiodic.py
+++ b/pcigale/sed_modules/sfhperiodic.py
@@ -55,7 +55,7 @@ class SfhPeriodic(SedModule):
             1000
         )),
         ("sfr_A", (
-            "float(min=0.)",
+            "cigale_list(minvalue=0.)",
             "Multiplicative factor controlling the amplitude of SFR (valid "
             "for each event).",
             1.