diff --git a/src/epanet.c b/src/epanet.c
index 53b1040..267a0de 100644
--- a/src/epanet.c
+++ b/src/epanet.c
@@ -106,7 +106,6 @@ execute function x and set the error code equal to its return value.
 
 *******************************************************************************
 */
-#define _CRT_SECURE_NO_DEPRECATE
 
 /*** New compile directives ***/                                               //(2.00.11 - LR)
 //#define CLE     /* Compile as a command line executable */
diff --git a/src/hydraul.c b/src/hydraul.c
index 51b30a6..722b40c 100644
--- a/src/hydraul.c
+++ b/src/hydraul.c
@@ -45,7 +45,6 @@ AUTHOR:     L. Rossman
      writehydwarn() -- see REPORT.C
 *******************************************************************
 */
-#define _CRT_SECURE_NO_DEPRECATE
 
 #include <stdio.h>
 #include <string.h>
diff --git a/src/inpfile.c b/src/inpfile.c
index cf5d84f..204d61f 100644
--- a/src/inpfile.c
+++ b/src/inpfile.c
@@ -18,7 +18,6 @@ data describing a piping network to a file in EPANET's text format.
                                                                     
 ********************************************************************
 */
-#define _CRT_SECURE_NO_DEPRECATE
 
 #include <stdio.h>
 #include <string.h>
diff --git a/src/input1.c b/src/input1.c
index b78254c..4ef941c 100644
--- a/src/input1.c
+++ b/src/input1.c
@@ -20,7 +20,6 @@ AUTHOR:     L. Rossman
 
 *********************************************************************
 */
-#define _CRT_SECURE_NO_DEPRECATE
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/input2.c b/src/input2.c
index 6c73b19..e680f0d 100644
--- a/src/input2.c
+++ b/src/input2.c
@@ -24,7 +24,6 @@ The following utility functions are all called from INPUT3.C
 
 **********************************************************************
 */
-#define _CRT_SECURE_NO_DEPRECATE
 
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/src/input3.c b/src/input3.c
index 7022639..a8fdfe0 100644
--- a/src/input3.c
+++ b/src/input3.c
@@ -19,7 +19,6 @@ All functions in this module are called from newline() in INPUT2.C.
 
 **********************************************************************
 */
-#define _CRT_SECURE_NO_DEPRECATE
 
 #include <stdlib.h>
 #include <stdio.h>
diff --git a/src/report.c b/src/report.c
index 1e00547..ad22934 100644
--- a/src/report.c
+++ b/src/report.c
@@ -24,7 +24,6 @@ formatted string S to the report file.
                                                                     
 ********************************************************************
 */
-#define _CRT_SECURE_NO_DEPRECATE
 
 #include <stdio.h>
 #include <string.h>
diff --git a/src/rules.c b/src/rules.c
index a786875..fda54b1 100644
--- a/src/rules.c
+++ b/src/rules.c
@@ -22,8 +22,6 @@ AUTHOR:     L. Rossman
 
 **********************************************************************
 */
-#define _CRT_SECURE_NO_DEPRECATE
-
 #include <stdio.h>
 #include <string.h>
 #include <malloc.h>