diff --git a/julia/src/inner_loop/inner_loop.jl b/julia/src/inner_loop/inner_loop.jl
index 21d4d3c..b4d18e0 100644
--- a/julia/src/inner_loop/inner_loop.jl
+++ b/julia/src/inner_loop/inner_loop.jl
@@ -44,7 +44,7 @@ function inner_loop(launch_date::DateTime,
   end
 
   time = utc2et(Dates.format(launch_date,"yyyy-mm-ddTHH:MM:SS"))
-  thrust_profiles = []
+  thrust_profiles = {Float64}[]
 
   for phase in phases
     planet1_state = [spkssb(ids[phase.from_planet], time, "J2000"); 0.0]