diff --git a/core/core-projects.el b/core/core-projects.el
index d4ba241a3..23af34487 100644
--- a/core/core-projects.el
+++ b/core/core-projects.el
@@ -138,7 +138,7 @@ c) are not valid projectile projects."
     (setq projectile-generic-command
           (concat (format "%s . -0 -H -E .git --color=never --type file --type symlink --follow"
                           doom-projectile-fd-binary)
-                  (if IS-WINDOWS " --path-separator=/"))
+                  (if IS-WINDOWS " --path-separator=//"))
           projectile-git-command projectile-generic-command
           projectile-git-submodule-command nil
           ;; ensure Windows users get fd's benefits
@@ -151,7 +151,7 @@ c) are not valid projectile projects."
                   (cl-loop for dir in projectile-globally-ignored-directories
                            concat " --glob "
                            concat (shell-quote-argument (concat "!" dir)))
-                  (if IS-WINDOWS " --path-separator /"))
+                  (if IS-WINDOWS " --path-separator //"))
           projectile-git-command projectile-generic-command
           projectile-git-submodule-command nil
           ;; ensure Windows users get rg's benefits
diff --git a/modules/completion/ivy/config.el b/modules/completion/ivy/config.el
index 24dd8ffbe..4b4a7562c 100644
--- a/modules/completion/ivy/config.el
+++ b/modules/completion/ivy/config.el
@@ -207,6 +207,14 @@ evil-ex-specific constructs, so we disable it solely in evil-ex."
   ;; of its own, on top of the defaults.
   (setq ivy-initial-inputs-alist nil)
 
+  ;; REVIEW Fix #3215: prevents mingw throwing an error trying to expand / to an
+  ;;        absolute path. Remove this when it is fixed upstream in counsel.
+  (when (memq system-type '(windows-nt ms-dos))
+    (setq counsel-rg-base-command
+          (replace-regexp-in-string "--path-separator /"
+                                    "--path-separator //"
+                                    counsel-rg-base-command)))
+
   ;; Integrate with `helpful'
   (setq counsel-describe-function-function #'helpful-callable
         counsel-describe-variable-function #'helpful-variable)