diff --git a/src/character.cpp b/src/character.cpp
index f3e8c5d10187c..c2b46774186a0 100644
--- a/src/character.cpp
+++ b/src/character.cpp
@@ -10219,7 +10219,7 @@ std::vector<run_cost_effect> Character::run_cost_effects( float &movecost ) cons
                               1 );
         run_cost_effect_mul( obstacle_mult, _( "Obstacle Muts." ) );
 
-        if( has_proficiency( proficiency_prof_parkour ) ) {
+        if( has_proficiency( proficiency_prof_parkour ) && !is_prone() ) {
             run_cost_effect_mul( 0.5, _( "Parkour" ) );
         }