diff --git a/ext/pulse/pulsedeviceprovider.h b/ext/pulse/pulsedeviceprovider.h
index 5994d1a291..0892ad5861 100644
--- a/ext/pulse/pulsedeviceprovider.h
+++ b/ext/pulse/pulsedeviceprovider.h
@@ -93,4 +93,6 @@ struct _GstPulseDeviceClass {
 
 GType        gst_pulse_device_get_type (void);
 
+G_END_DECLS
+
 #endif /* __GST_PULSE_DEVICE_PROVIDER_H__ */
diff --git a/sys/v4l2/gstv4l2deviceprovider.h b/sys/v4l2/gstv4l2deviceprovider.h
index 865727a517..5e05b35b92 100644
--- a/sys/v4l2/gstv4l2deviceprovider.h
+++ b/sys/v4l2/gstv4l2deviceprovider.h
@@ -96,4 +96,6 @@ struct _GstV4l2DeviceClass {
 
 GType        gst_v4l2_device_get_type (void);
 
+G_END_DECLS
+
 #endif /* __GST_V4L2_DEVICE_PROVIDER_H__ */
diff --git a/sys/v4l2/gstv4l2tuner.h b/sys/v4l2/gstv4l2tuner.h
index 3556502b20..7ccffcd116 100644
--- a/sys/v4l2/gstv4l2tuner.h
+++ b/sys/v4l2/gstv4l2tuner.h
@@ -195,4 +195,6 @@ interface_as_function ## _tuner_interface_init (GstTunerInterface * iface)
   iface->signal_strength = interface_as_function ## _tuner_signal_strength;           \
 }                                                                                     \
 
+G_END_DECLS
+
 #endif /* __GST_V4L2_TUNER_H__ */