diff --git a/debugHelper.h b/debugHelper.h
index c8b2913..388c56c 100644
--- a/debugHelper.h
+++ b/debugHelper.h
@@ -1,8 +1,8 @@
 #ifndef ENABLE_PRINTF_MODULE
 
     // Uncomment next line to enable debug printf
-    #define ENABLE_PRINTF
-    #define ENABLE_PRINTF_ERROR
+    // #define ENABLE_PRINTF
+    // #define ENABLE_PRINTF_ERROR
 
     #define CURRENT_FILE __FILE__
     #define CURRENT_LINE __LINE__
diff --git a/ftpCommandElaborate.c b/ftpCommandElaborate.c
index 7ebf29b..b7c963f 100755
--- a/ftpCommandElaborate.c
+++ b/ftpCommandElaborate.c
@@ -2530,6 +2530,24 @@ int parseCommandEprt(ftpDataType *data, int socketId)
         }
     }
 
+    #ifndef IPV6_ENABLED
+    if(data->clients[socketId].workerData.addressType == 2)
+    {
+        addLog("Error parsing EPRT", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
+        returnCode = socketPrintf(data, socketId, "s", "501 command syntax error no ipv6 supported in this version.\r\n");
+
+        if (returnCode <= 0) 
+        {
+            addLog("socketPrintfError ", CURRENT_FILE, CURRENT_LINE, CURRENT_FUNC);
+            return FTP_COMMAND_PROCESSED_WRITE_ERROR;
+        }
+        else
+        {
+            return FTP_COMMAND_PROCESSED;
+        }
+    }   
+    #endif
+    
     void *pReturn;
     if (data->clients[socketId].workerData.threadIsAlive == 1)
     {
diff --git a/ftpServer.c b/ftpServer.c
index a18c0a8..ac0aa6b 100755
--- a/ftpServer.c
+++ b/ftpServer.c
@@ -240,9 +240,11 @@ void *connectionWorkerHandle(void * socketId)
     my_printf("\n -----------------  CREATING ACTIVE SOCKET --------------!");
     if (ftpData.clients[theSocketId].workerData.addressType == 1)
         ftpData.clients[theSocketId].workerData.socketConnection = createActiveSocket(ftpData.clients[theSocketId].workerData.connectionPort, ftpData.clients[theSocketId].workerData.activeIpAddress);
+#ifdef IPV6_ENABLED
     else if (ftpData.clients[theSocketId].workerData.addressType == 2)
         ftpData.clients[theSocketId].workerData.socketConnection = createActiveSocketV6(ftpData.clients[theSocketId].workerData.connectionPort, ftpData.clients[theSocketId].workerData.activeIpAddress);    
-        
+#endif
+
 	#ifdef OPENSSL_ENABLED
 	if (ftpData.clients[theSocketId].dataChannelIsTls == 1)
 	{
diff --git a/library/connection.c b/library/connection.c
index 2cfbb72..ec743f7 100755
--- a/library/connection.c
+++ b/library/connection.c
@@ -632,7 +632,7 @@ int createPassiveSocket(int port)
 
 #endif
 
-
+#ifdef IPV6_ENABLED
 int createActiveSocketV6(int port, char *ipAddress)
 {
 	int sockfd;
@@ -690,6 +690,7 @@ int createActiveSocketV6(int port, char *ipAddress)
 
   return sockfd;
 }
+#endif
 
 int createActiveSocket(int port, char *ipAddress)
 {
@@ -754,7 +755,6 @@ int createActiveSocket(int port, char *ipAddress)
   return sockfd;
 }
 
-
 void fdInit(ftpDataType * ftpData)
 {
     FD_ZERO(&ftpData->connectionData.rset);
diff --git a/library/connection.h b/library/connection.h
index f2e5136..3a64a4f 100755
--- a/library/connection.h
+++ b/library/connection.h
@@ -36,7 +36,11 @@ int getMaximumSocketFd(int mainSocket, ftpDataType * data);
 int createSocket(ftpDataType * ftpData);
 int createPassiveSocket(int port);
 int createActiveSocket(int port, char *ipAddress);
+
+#ifdef IPV6_ENABLED
 int createActiveSocketV6(int port, char *ipAddress);
+#endif
+
 void fdInit(ftpDataType * ftpData);
 void fdAdd(ftpDataType * ftpData, int index);
 void fdRemove(ftpDataType * ftpData, int index);