diff --git a/Weapons/UnderwaterMines/SphericalMinePrototype.x3d b/Weapons/UnderwaterMines/SphericalMinePrototype.x3d
index ff545cf0a65cc2926394e1cb8c9df3a3bed417e4..6628519192c0ef22e377cf0482c555cf2ed0bb7d 100644
--- a/Weapons/UnderwaterMines/SphericalMinePrototype.x3d
+++ b/Weapons/UnderwaterMines/SphericalMinePrototype.x3d
@@ -134,7 +134,7 @@
       <Viewpoint description='5000+ m: two invisible SphericalMines' position='5 -10 5010'/>
     </Group>
     <!-- Proximity activation triggers switch in NavigationInfo mode between EXAMINE and WALK - pretty cool! -->
-    <NavigationInfo DEF='NAVIGATION' speed='20' type='WALK" "EXAMINE" "ANY'/>
+    <NavigationInfo DEF='NAVIGATION' speed='20' type='"WALK" "EXAMINE" "ANY"'/>
     <Script DEF='NAVIGATION_MODE'>
       <field accessType='inputOnly' name='inProximity' type='SFBool'/>
       <field accessType='outputOnly' name='type' type='MFString'/>