diff --git a/src/libinput.rs b/src/libinput.rs
index 5159a46e..9cf6090f 100644
--- a/src/libinput.rs
+++ b/src/libinput.rs
@@ -86,7 +86,7 @@ pub struct LibInput {
     li: *mut libinput,
 }
 
-extern "C" {
+unsafe extern "C" {
     fn jay_libinput_log_handler_bridge();
 }
 
diff --git a/src/libinput/sys.rs b/src/libinput/sys.rs
index 56f7a7c8..a30c6ea0 100644
--- a/src/libinput/sys.rs
+++ b/src/libinput/sys.rs
@@ -34,7 +34,7 @@ pub struct libinput_tablet_tool(u8);
 pub struct libinput_event_touch(u8);
 
 #[link(name = "input")]
-extern "C" {
+unsafe extern "C" {
     pub fn libinput_log_set_handler(libinput: *mut libinput, log_handler: libinput_log_handler);
     pub fn libinput_log_set_priority(libinput: *mut libinput, priority: libinput_log_priority);
     pub fn libinput_path_create_context(
diff --git a/src/pango.rs b/src/pango.rs
index afce8b40..26c195ef 100644
--- a/src/pango.rs
+++ b/src/pango.rs
@@ -20,7 +20,7 @@ struct cairo_surface_t(u8);
 struct cairo_t(u8);
 
 #[link(name = "cairo")]
-extern "C" {
+unsafe extern "C" {
     fn cairo_image_surface_create(
         format: cairo_format_t,
         width: c::c_int,
@@ -47,7 +47,7 @@ extern "C" {
 struct PangoContext_(u8);
 
 #[link(name = "pangocairo-1.0")]
-extern "C" {
+unsafe extern "C" {
     fn pango_cairo_create_context(cr: *mut cairo_t) -> *mut PangoContext_;
     fn pango_cairo_show_layout(cr: *mut cairo_t, layout: *mut PangoLayout_);
 }
@@ -56,7 +56,7 @@ extern "C" {
 struct GObject(u8);
 
 #[link(name = "gobject-2.0")]
-extern "C" {
+unsafe extern "C" {
     fn g_object_unref(object: *mut GObject);
 }
 
@@ -66,7 +66,7 @@ struct PangoFontDescription_(u8);
 struct PangoLayout_(u8);
 
 #[link(name = "pango-1.0")]
-extern "C" {
+unsafe extern "C" {
     fn pango_font_description_from_string(str: *const c::c_char) -> *mut PangoFontDescription_;
     fn pango_font_description_free(desc: *mut PangoFontDescription_);
     fn pango_font_description_get_size(desc: *mut PangoFontDescription_) -> c::c_int;
diff --git a/src/udev.rs b/src/udev.rs
index 777e76e4..fe077a96 100644
--- a/src/udev.rs
+++ b/src/udev.rs
@@ -19,7 +19,7 @@ struct udev_list_entry(u8);
 struct udev_device(u8);
 
 #[link(name = "udev")]
-extern "C" {
+unsafe extern "C" {
     fn udev_new() -> *mut udev;
     fn udev_unref(udev: *mut udev) -> *mut udev;
 
diff --git a/src/video/gbm.rs b/src/video/gbm.rs
index 9a57c92a..6fbee1d1 100644
--- a/src/video/gbm.rs
+++ b/src/video/gbm.rs
@@ -83,7 +83,7 @@ struct gbm_import_fd_modifier_data {
 }
 
 #[link(name = "gbm")]
-extern "C" {
+unsafe extern "C" {
     fn gbm_create_device(fd: c::c_int) -> *mut Device;
     fn gbm_device_destroy(dev: *mut Device);
 
diff --git a/src/xkbcommon.rs b/src/xkbcommon.rs
index c4cd21e2..0e14b3e2 100644
--- a/src/xkbcommon.rs
+++ b/src/xkbcommon.rs
@@ -71,7 +71,7 @@ impl Default for xkb_rule_names {
 }
 
 #[link(name = "xkbcommon")]
-extern "C" {
+unsafe extern "C" {
     fn xkb_context_new(flags: xkb_context_flags) -> *mut xkb_context;
     fn xkb_context_unref(context: *mut xkb_context);
     fn xkb_context_set_log_verbosity(context: *mut xkb_context, verbosity: c::c_int);
@@ -121,7 +121,7 @@ pub struct XkbContext {
     ids: KeymapIds,
 }
 
-extern "C" {
+unsafe extern "C" {
     fn jay_xkbcommon_log_handler_bridge();
 }