diff --git a/app/models/champs/decimal_number_champ.rb b/app/models/champs/decimal_number_champ.rb
index 199e38079..d7063cf8e 100644
--- a/app/models/champs/decimal_number_champ.rb
+++ b/app/models/champs/decimal_number_champ.rb
@@ -1,5 +1,11 @@
 class Champs::DecimalNumberChamp < Champ
-  validates :value, numericality: { allow_nil: true, allow_blank: true }
+  validates :value, numericality: {
+    allow_nil: true,
+    allow_blank: true,
+    message: -> (object, data) {
+      "« #{object.libelle} » " + object.errors.generate_message(data[:attribute].downcase, :not_a_number)
+    }
+  }
 
   def for_export
     processed_value
diff --git a/app/models/champs/integer_number_champ.rb b/app/models/champs/integer_number_champ.rb
index 4717c24df..c2c0ea254 100644
--- a/app/models/champs/integer_number_champ.rb
+++ b/app/models/champs/integer_number_champ.rb
@@ -1,5 +1,12 @@
 class Champs::IntegerNumberChamp < Champ
-  validates :value, numericality: { only_integer: true, allow_nil: true, allow_blank: true }
+  validates :value, numericality: {
+    only_integer: true,
+    allow_nil: true,
+    allow_blank: true,
+    message: -> (object, data) {
+      "« #{object.libelle} » " + object.errors.generate_message(data[:attribute].downcase, :not_an_integer)
+    }
+  }
 
   def for_export
     processed_value
diff --git a/config/locales/fr.yml b/config/locales/fr.yml
index a06351dbb..0033b1135 100644
--- a/config/locales/fr.yml
+++ b/config/locales/fr.yml
@@ -128,6 +128,7 @@ fr:
       messages:
         blank: "doit être rempli"
         not_a_number: 'doit être un nombre'
+        not_an_integer: 'doit être un nombre entier (sans chiffres après la virgule)'
         greater_than: "doit être supérieur à %{count}"
         greater_than_or_equal_to: "doit être supérieur ou égal à %{count}"
         less_than: "doit être inférieur à %{count}"
diff --git a/config/locales/models/champs/fr.yml b/config/locales/models/champs/fr.yml
new file mode 100644
index 000000000..d1ab85d27
--- /dev/null
+++ b/config/locales/models/champs/fr.yml
@@ -0,0 +1,5 @@
+fr:
+  activerecord:
+    attributes:
+      champs:
+        value: La valeur du champ
diff --git a/spec/models/champs/decimal_number_champ_spec.rb b/spec/models/champs/decimal_number_champ_spec.rb
index 8ec0ebdaf..7cc511b82 100644
--- a/spec/models/champs/decimal_number_champ_spec.rb
+++ b/spec/models/champs/decimal_number_champ_spec.rb
@@ -1,7 +1,7 @@
 require 'spec_helper'
 
 describe Champs::DecimalNumberChamp do
-  subject { Champs::DecimalNumberChamp.new(value: value) }
+  subject { build(:champ_decimal_number, value: value).tap(&:valid?) }
 
   describe '#valid?' do
     context 'when the value is integer number' do
@@ -20,6 +20,7 @@ describe Champs::DecimalNumberChamp do
       let(:value) { 'toto' }
 
       it { is_expected.to_not be_valid }
+      it { expect(subject.errors[:value]).to eq(["« #{subject.libelle} » doit être un nombre"]) }
     end
 
     context 'when the value is blank' do
diff --git a/spec/models/champs/integer_number_champ_spec.rb b/spec/models/champs/integer_number_champ_spec.rb
index 6a7152759..c61b25576 100644
--- a/spec/models/champs/integer_number_champ_spec.rb
+++ b/spec/models/champs/integer_number_champ_spec.rb
@@ -1,7 +1,7 @@
 require 'spec_helper'
 
 describe Champs::IntegerNumberChamp do
-  subject { Champs::IntegerNumberChamp.new(value: value) }
+  subject { build(:champ_integer_number, value: value).tap(&:valid?) }
 
   describe '#valid?' do
     context 'when the value is integer number' do
@@ -14,12 +14,14 @@ describe Champs::IntegerNumberChamp do
       let(:value) { 2.6 }
 
       it { is_expected.to_not be_valid }
+      it { expect(subject.errors[:value]).to eq(["« #{subject.libelle} » doit être un nombre entier (sans chiffres après la virgule)"]) }
     end
 
     context 'when the value is not a number' do
       let(:value) { 'toto' }
 
       it { is_expected.to_not be_valid }
+      it { expect(subject.errors[:value]).to eq(["« #{subject.libelle} » doit être un nombre entier (sans chiffres après la virgule)"]) }
     end
 
     context 'when the value is blank' do