diff --git a/src/core/operations/DESDecrypt.mjs b/src/core/operations/DESDecrypt.mjs
index 92b9609f..42097cc2 100644
--- a/src/core/operations/DESDecrypt.mjs
+++ b/src/core/operations/DESDecrypt.mjs
@@ -73,7 +73,7 @@ class DESDecrypt extends Operation {
 DES uses a key length of 8 bytes (64 bits).
 Triple DES uses a key length of 24 bytes (192 bits).`);
         }
-        if (iv.length !== 8) {
+        if (iv.length !== 8 && mode !== "ECB") {
             throw new OperationError(`Invalid IV length: ${iv.length} bytes
 
 DES uses an IV length of 8 bytes (64 bits).
diff --git a/src/core/operations/DESEncrypt.mjs b/src/core/operations/DESEncrypt.mjs
index ee845151..6f297d32 100644
--- a/src/core/operations/DESEncrypt.mjs
+++ b/src/core/operations/DESEncrypt.mjs
@@ -73,7 +73,7 @@ class DESEncrypt extends Operation {
 DES uses a key length of 8 bytes (64 bits).
 Triple DES uses a key length of 24 bytes (192 bits).`);
         }
-        if (iv.length !== 8) {
+        if (iv.length !== 8 && mode !== "ECB") {
             throw new OperationError(`Invalid IV length: ${iv.length} bytes
 
 DES uses an IV length of 8 bytes (64 bits).
diff --git a/src/core/operations/TripleDESDecrypt.mjs b/src/core/operations/TripleDESDecrypt.mjs
index f1aa02c8..70376a5f 100644
--- a/src/core/operations/TripleDESDecrypt.mjs
+++ b/src/core/operations/TripleDESDecrypt.mjs
@@ -75,7 +75,7 @@ class TripleDESDecrypt extends Operation {
 Triple DES uses a key length of 24 bytes (192 bits).
 DES uses a key length of 8 bytes (64 bits).`);
         }
-        if (iv.length !== 8) {
+        if (iv.length !== 8 && mode !== "ECB") {
             throw new OperationError(`Invalid IV length: ${iv.length} bytes
 
 Triple DES uses an IV length of 8 bytes (64 bits).
diff --git a/src/core/operations/TripleDESEncrypt.mjs b/src/core/operations/TripleDESEncrypt.mjs
index 9f767ab9..bcd77d2e 100644
--- a/src/core/operations/TripleDESEncrypt.mjs
+++ b/src/core/operations/TripleDESEncrypt.mjs
@@ -75,7 +75,7 @@ class TripleDESEncrypt extends Operation {
 Triple DES uses a key length of 24 bytes (192 bits).
 DES uses a key length of 8 bytes (64 bits).`);
         }
-        if (iv.length !== 8) {
+        if (iv.length !== 8 && mode !== "ECB") {
             throw new OperationError(`Invalid IV length: ${iv.length} bytes
 
 Triple DES uses an IV length of 8 bytes (64 bits).