diff --git a/src/shell/interpreter.zig b/src/shell/interpreter.zig
index a756462323..c56fb76dc0 100644
--- a/src/shell/interpreter.zig
+++ b/src/shell/interpreter.zig
@@ -509,11 +509,17 @@ pub const EnvMap = struct {
     const MapType = std.ArrayHashMap(EnvStr, EnvStr, struct {
         pub fn hash(self: @This(), s: EnvStr) u32 {
             _ = self;
+            if (bun.Environment.isWindows) {
+                return bun.CaseInsensitiveASCIIStringContext.hash(undefined, s.slice());
+            }
             return std.array_hash_map.hashString(s.slice());
         }
         pub fn eql(self: @This(), a: EnvStr, b: EnvStr, b_index: usize) bool {
             _ = self;
             _ = b_index;
+            if (bun.Environment.isWindows) {
+                return bun.CaseInsensitiveASCIIStringContext.eql(undefined, a.slice(), b.slice(), undefined);
+            }
             return std.array_hash_map.eqlString(a.slice(), b.slice());
         }
     }, true);