diff --git a/libs/libc/stdio/lib_fopen.c b/libs/libc/stdio/lib_fopen.c
index 9798654735..537a92abca 100644
--- a/libs/libc/stdio/lib_fopen.c
+++ b/libs/libc/stdio/lib_fopen.c
@@ -49,7 +49,7 @@
 #define MODE_NONE 0        /* No access mode determined */
 #define MODE_MASK (MODE_R | MODE_W | MODE_A)
 
-#define FLAG_KEEP (O_BINARY | O_EXCL)
+#define FLAG_KEEP (O_BINARY | O_CLOEXEC | O_EXCL)
 
 /****************************************************************************
  * Public Functions
@@ -263,6 +263,21 @@ int lib_mode2oflags(FAR const char *mode)
               }
             break;
 
+          /* Open for close on execute */
+
+          case 'e' :
+            if ((state & MODE_MASK) != MODE_NONE)
+              {
+                /* The file will be closed on execute */
+
+                oflags |= O_CLOEXEC;
+              }
+            else
+              {
+                goto errout;
+              }
+            break;
+
           /* Open for exclusive access ("{r|w|a|b|+}x") */
 
           case 'x' :