diff --git a/src/config-ini.c b/src/config-ini.c
index 05fca5d4..c596f929 100644
--- a/src/config-ini.c
+++ b/src/config-ini.c
@@ -17,6 +17,9 @@
    Copyright (c) 2010  Jon Lund Steffensen <jonlst@gmail.com>
 */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
 
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/gamma-drm.c b/src/gamma-drm.c
index c0863e5e..04d4f2c0 100644
--- a/src/gamma-drm.c
+++ b/src/gamma-drm.c
@@ -18,6 +18,10 @@
    Copyright (c) 2017  Jon Lund Steffensen <jonlst@gmail.com>
 */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
diff --git a/src/gamma-dummy.c b/src/gamma-dummy.c
index c2f27362..1730743b 100644
--- a/src/gamma-dummy.c
+++ b/src/gamma-dummy.c
@@ -17,6 +17,10 @@
    Copyright (c) 2013-2017  Jon Lund Steffensen <jonlst@gmail.com>
 */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 
diff --git a/src/gamma-randr.c b/src/gamma-randr.c
index 70e82281..388f322f 100644
--- a/src/gamma-randr.c
+++ b/src/gamma-randr.c
@@ -17,6 +17,10 @@
    Copyright (c) 2010-2017  Jon Lund Steffensen <jonlst@gmail.com>
 */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
diff --git a/src/gamma-vidmode.c b/src/gamma-vidmode.c
index bd5435fe..e604c3b3 100644
--- a/src/gamma-vidmode.c
+++ b/src/gamma-vidmode.c
@@ -17,6 +17,10 @@
    Copyright (c) 2010-2017  Jon Lund Steffensen <jonlst@gmail.com>
 */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/src/gamma-w32gdi.c b/src/gamma-w32gdi.c
index de34bb64..730cd0cb 100644
--- a/src/gamma-w32gdi.c
+++ b/src/gamma-w32gdi.c
@@ -17,6 +17,10 @@
    Copyright (c) 2010-2017  Jon Lund Steffensen <jonlst@gmail.com>
 */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 
diff --git a/src/location-geoclue2.c b/src/location-geoclue2.c
index 696867e1..06015c50 100644
--- a/src/location-geoclue2.c
+++ b/src/location-geoclue2.c
@@ -17,6 +17,10 @@
    Copyright (c) 2014-2017  Jon Lund Steffensen <jonlst@gmail.com>
 */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 
diff --git a/src/location-manual.c b/src/location-manual.c
index 137500c7..db3a8a93 100644
--- a/src/location-manual.c
+++ b/src/location-manual.c
@@ -17,6 +17,10 @@
    Copyright (c) 2010-2017  Jon Lund Steffensen <jonlst@gmail.com>
 */
 
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>