diff --git a/src/flyingship.c b/src/flyingship.c
index 88d37a6d1..b640b8940 100644
--- a/src/flyingship.c
+++ b/src/flyingship.c
@@ -14,15 +14,6 @@
 /* libc includes */
 #include <assert.h>
 
-int levitate_ship(ship * sh, unit * mage, double power, int duration)
-{
-    curse *c = shipcurse_flyingship(sh, mage, power, duration);
-    if (c) {
-        return c->no;
-    }
-    return 0;
-}
-
 /* ------------------------------------------------------------- */
 /* Name:       Luftschiff
 * Stufe:      6
@@ -89,3 +80,21 @@ int sp_flying_ship(castorder * co)
         msg_release(m);
     return cast_level;
 }
+
+int levitate_ship(ship * sh, unit * mage, double power, int duration)
+{
+    curse *c = shipcurse_flyingship(sh, mage, power, duration);
+    if (c) {
+        return c->no;
+    }
+    return 0;
+}
+
+bool flying_ship(const ship * sh)
+{
+    if (sh->type->flags & SFL_FLY)
+        return true;
+    if (sh->flags & SF_FLYING)
+        return true;
+    return false;
+}
diff --git a/src/flyingship.h b/src/flyingship.h
index 33bc3a86f..cbf981f0c 100644
--- a/src/flyingship.h
+++ b/src/flyingship.h
@@ -5,14 +5,17 @@
 
 #include "magic.h"
 
+#include <kernel/ship.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+    int sp_flying_ship(castorder * co);
+
     int levitate_ship(struct ship *sh, struct unit *mage, double power,
         int duration);
-
-    int sp_flying_ship(castorder * co);
+    bool flying_ship(const ship * sh);
 
 #ifdef __cplusplus
 }
diff --git a/src/move.c b/src/move.c
index 8eaf052ca..87b1e44f7 100644
--- a/src/move.c
+++ b/src/move.c
@@ -28,6 +28,7 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #include "monster.h"
 #include "lighthouse.h"
 #include "piracy.h"
+#include "flyingship.h"
 
 #include <kernel/build.h>
 #include <kernel/building.h>
@@ -674,15 +675,6 @@ int check_ship_allowed(struct ship *sh, const region * r)
     return SA_NO_COAST;
 }
 
-static bool flying_ship(const ship * sh)
-{
-    if (sh->type->flags & SFL_FLY)
-        return true;
-    if (sh->flags & SF_FLYING)
-        return true;
-    return false;
-}
-
 static void set_coast(ship * sh, region * r, region * rnext)
 {
     if (sh->type->flags & SFL_NOCOAST) {