diff --git a/src/haproxy.c b/src/haproxy.c
index fd5ef3061..5d3d92869 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -3183,6 +3183,8 @@ int main(int argc, char **argv)
 				exit(1); /* there has been an error */
 			}
 			else if (ret == 0) { /* child breaks here */
+				/* This one must not be exported, it's internal! */
+				unsetenv("HAPROXY_MWORKER_REEXEC");
 				ha_random_jump96(1);
 			}
 			else { /* parent here */
diff --git a/src/mworker-prog.c b/src/mworker-prog.c
index 4a6466213..9de94a289 100644
--- a/src/mworker-prog.c
+++ b/src/mworker-prog.c
@@ -110,6 +110,8 @@ int mworker_ext_launch_all()
 					exit(1);
 				}
 
+				/* This one must not be exported, it's internal! */
+				unsetenv("HAPROXY_MWORKER_REEXEC");
 				execvp(child->command[0], child->command);
 
 				ha_alert("Cannot execute %s: %s\n", child->command[0], strerror(errno));