diff --git a/common/arch.h b/common/arch.h
index ba27a32b..873fd1d8 100644
--- a/common/arch.h
+++ b/common/arch.h
@@ -19,10 +19,6 @@
 #if !defined(ARCH_H)
 #define ARCH_H
 
-#if defined(HAVE_CONFIG_H)
-#include "config_ac.h"
-#endif
-
 #include <stdlib.h>
 
 #if defined(HAVE_STDINT_H)
diff --git a/libxrdp/libxrdp.h b/libxrdp/libxrdp.h
index 9b781c5c..53993599 100644
--- a/libxrdp/libxrdp.h
+++ b/libxrdp/libxrdp.h
@@ -21,9 +21,6 @@
 #if !defined(LIBXRDP_H)
 #define LIBXRDP_H
 
-#if defined(HAVE_CONFIG_H)
-#include "config_ac.h"
-#endif
 #include "arch.h"
 #include "parse.h"
 #include "trans.h"
diff --git a/sesman/libscp/libscp.h b/sesman/libscp/libscp.h
index ed73380f..ddfdb6e4 100644
--- a/sesman/libscp/libscp.h
+++ b/sesman/libscp/libscp.h
@@ -27,10 +27,6 @@
 #ifndef LIBSCP_H
 #define LIBSCP_H
 
-#if defined(HAVE_CONFIG_H)
-#include "config_ac.h"
-#endif
-
 #include "libscp_types.h"
 #include "libscp_commands.h"
 
diff --git a/sesman/sesman.h b/sesman/sesman.h
index 09b781bc..576a28e8 100644
--- a/sesman/sesman.h
+++ b/sesman/sesman.h
@@ -27,9 +27,6 @@
 #ifndef SESMAN_H
 #define SESMAN_H
 
-#if defined(HAVE_CONFIG_H)
-#include "config_ac.h"
-#endif
 #include "arch.h"
 #include "parse.h"
 #include "os_calls.h"
diff --git a/xrdp/xrdp.h b/xrdp/xrdp.h
index 13bd398c..b4b88499 100644
--- a/xrdp/xrdp.h
+++ b/xrdp/xrdp.h
@@ -19,9 +19,6 @@
  */
 
 /* include other h files */
-#if defined(HAVE_CONFIG_H)
-#include "config_ac.h"
-#endif
 #include "arch.h"
 #include "parse.h"
 #include "trans.h"