diff --git a/R/R/prophet.R b/R/R/prophet.R
index 0d14053..efde877 100644
--- a/R/R/prophet.R
+++ b/R/R/prophet.R
@@ -248,7 +248,11 @@ compile_stan_model <- function() {
     'You should not see this message more than once after install.'
   )
 
-  dest <- file.path(path.package("prophet"), 'libs')
+  if (.Platform$OS.type == "windows") {
+    dest <- file.path(path.package("prophet"), 'libs', .Platform$r_arch)
+  } else {
+    dest <- file.path(path.package("prophet"), 'libs')
+  }  
   dir.create(dest, recursive = TRUE, showWarnings = FALSE)
 
   packageStartupMessage(paste('Writing model to:', dest))
diff --git a/R/R/zzz.R b/R/R/zzz.R
index b8c32f5..f500968 100644
--- a/R/R/zzz.R
+++ b/R/R/zzz.R
@@ -7,8 +7,13 @@
   # Create environment for storing stan model
   assign("prophet_model_env", new.env(), parent.env(environment()))
   tryCatch({
+    if (.Platform$OS.type == "windows") {
+      dest <- file.path('libs', .Platform$r_arch)
+    } else {
+      dest <- 'libs'
+    }
     binary <- system.file(
-      'libs',
+      dest,
       'prophet_stan_model.RData',
       package = 'prophet',
       mustWork = TRUE