diff --git a/src/core/production_factor.jl b/src/core/production_factor.jl
index 8f5139c01..a1f518c56 100644
--- a/src/core/production_factor.jl
+++ b/src/core/production_factor.jl
@@ -54,11 +54,11 @@ function get_production_factor(wind::Wind, latitude::Real, longitude::Real, time
 
     if all(length(a) > 0 for a in [wind.temperature_celsius, wind.pressure_atmospheres, wind.wind_direction_degrees,
                                    wind.wind_meters_per_sec])
-        if all(a isa Vector || length(a) == 8760 for a in [wind.temperature_celsius, wind.pressure_atmospheres, wind.wind_direction_degrees,
+        if all(a isa Vector && length(a) == 8760 for a in [wind.temperature_celsius, wind.pressure_atmospheres, wind.wind_direction_degrees,
                                                                   wind.wind_meters_per_sec])
             push!(resources, [wind.temperature_celsius, wind.pressure_atmospheres, wind.wind_meters_per_sec, wind.wind_direction_degrees]...)
             resources = hcat(resources...)
-        elseif all(a isa Vector || length(a) == 2 for a in [wind.temperature_celsius, wind.pressure_atmospheres, wind.wind_direction_degrees,
+        elseif all(a isa Vector && length(a) == 2 for a in [wind.temperature_celsius, wind.pressure_atmospheres, wind.wind_direction_degrees,
                                                                            wind.wind_meters_per_sec])
             push!(resources, [wind.temperature_celsius[1], wind.pressure_atmospheres[1], wind.wind_meters_per_sec[1], wind.wind_direction_degrees[1]]...)
             push!(resources, [wind.temperature_celsius[2], wind.pressure_atmospheres[2], wind.wind_meters_per_sec[2], wind.wind_direction_degrees[2]]...)