diff --git a/NEWS.md b/NEWS.md
index fd0c285a..53c85c24 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -13,6 +13,7 @@ NEW FEATURES :
 BUGFIXES : 
 
 * Fix `filter_synthesis` and `filter_year_by_year` parameters of `editLink()` in API mode
+* Fix `createDSR()` in API mode : daily binding constraint takes 366 rows 
 
 
 # antaresEditObject 0.6.1
diff --git a/R/createDSR.R b/R/createDSR.R
index 53940034..ad4b0e2a 100644
--- a/R/createDSR.R
+++ b/R/createDSR.R
@@ -262,10 +262,10 @@ createDSR <- function(areasAndDSRParam = NULL,
     
     #coef binding
     coefficientsDSR <- .getCoefDsr(areaName, nameDsr)
-    
+    # A binding constraint at a daily timestep expects 366 rows
     createBindingConstraint(
       nameBindDSR, 
-      values = matrix(data = c(rep(installedCapacityLink * as.double(numberHour), 365), rep(0, 365 * 2)), ncol = 3),
+      values = matrix(data = c(rep(installedCapacityLink * as.double(numberHour), 366), rep(0, 366 * 2)), ncol = 3),
       enabled = TRUE, 
       timeStep = "daily",
       operator = c("less"),
@@ -440,9 +440,10 @@ editDSR <- function(area = NULL,
   #coef binding
   coefficientsDSR <- .getCoefDsr(area, previousNameDsr)
   
+  # A binding constraint at a daily timestep expects 366 rows
   createBindingConstraint(
     previousNameDsr,
-    values = matrix(data = c(rep(newCapacityLink * as.double(previousNumberHour), 365), rep(0, 365 * 2)), ncol = 3),
+    values = matrix(data = c(rep(newCapacityLink * as.double(previousNumberHour), 366), rep(0, 366 * 2)), ncol = 3),
     enabled = TRUE, 
     timeStep = "daily",
     operator = c("less"), 
diff --git a/tests/testthat/test-createDSR.R b/tests/testthat/test-createDSR.R
index 5b1d7aec..5eb4a1c8 100644
--- a/tests/testthat/test-createDSR.R
+++ b/tests/testthat/test-createDSR.R
@@ -35,7 +35,9 @@ sapply(studies, function(study) {
     expect_equal(bindingList$a_dsr_3h$operator, "less")
     expect_equal(as.double(bindingList$a_dsr_3h$coefs["a%a_dsr_3h"]), -1)
     expect_equal(as.double(bindingList$b_dsr_7h$coefs["b%b_dsr_7h"]), -1)
-    
+    expect_equal(nrow(bindingList$a_dsr_3h$values), 366)
+		expect_equal(nrow(bindingList$b_dsr_7h$values), 366)
+		
     expect_equal(unique(bindingList$a_dsr_3h$values$less)[1], dsrData[dsrData$area=="a",]$unit*dsrData[dsrData$area=="a",]$nominalCapacity*dsrData[dsrData$area=="a",]$hour)
     expect_equal(unique(bindingList$b_dsr_7h$values$less)[1], dsrData[dsrData$area=="b",]$unit*dsrData[dsrData$area=="b",]$nominalCapacity*dsrData[dsrData$area=="b",]$hour)
     
@@ -136,4 +138,3 @@ sapply(studies, function(study) {
   unlink(x = file.path(pathstd, "test_case"), recursive = TRUE)
   
 })
-