diff --git a/cgi.go b/cgi.go
index 65229b2a54..bd6dad4938 100644
--- a/cgi.go
+++ b/cgi.go
@@ -27,20 +27,6 @@ import (
 	"github.com/dunglas/frankenphp/internal/phpheaders"
 )
 
-// cStringHTTPMethods caches C string versions of common HTTP methods
-// to avoid allocations in pinCString on every request.
-var cStringHTTPMethods = map[string]*C.char{
-	"GET":     C.CString("GET"),
-	"HEAD":    C.CString("HEAD"),
-	"POST":    C.CString("POST"),
-	"PUT":     C.CString("PUT"),
-	"DELETE":  C.CString("DELETE"),
-	"CONNECT": C.CString("CONNECT"),
-	"OPTIONS": C.CString("OPTIONS"),
-	"TRACE":   C.CString("TRACE"),
-	"PATCH":   C.CString("PATCH"),
-}
-
 // computeKnownVariables returns a set of CGI environment variables for the request.
 //
 // TODO: handle this case https://github.com/caddyserver/caddy/issues/3718
diff --git a/cgimethods.go b/cgimethods.go
new file mode 100644
index 0000000000..8b4a53760f
--- /dev/null
+++ b/cgimethods.go
@@ -0,0 +1,27 @@
+package frankenphp
+
+// const char *frankenphp_method_get = "GET";
+// const char *frankenphp_method_head = "HEAD";
+// const char *frankenphp_method_post = "POST";
+// const char *frankenphp_method_put = "PUT";
+// const char *frankenphp_method_delete = "DELETE";
+// const char *frankenphp_method_connect = "CONNECT";
+// const char *frankenphp_method_options = "OPTIONS";
+// const char *frankenphp_method_trace = "TRACE";
+// const char *frankenphp_method_patch = "PATCH";
+import "C"
+
+// cStringHTTPMethods maps common HTTP methods to static C strings, avoiding a
+// pinCString call per request. C literals, unlike C.CString, aren't reported as
+// leaks by LeakSanitizer, which can't see pointers held in Go memory.
+var cStringHTTPMethods = map[string]*C.char{
+	"GET":     C.frankenphp_method_get,
+	"HEAD":    C.frankenphp_method_head,
+	"POST":    C.frankenphp_method_post,
+	"PUT":     C.frankenphp_method_put,
+	"DELETE":  C.frankenphp_method_delete,
+	"CONNECT": C.frankenphp_method_connect,
+	"OPTIONS": C.frankenphp_method_options,
+	"TRACE":   C.frankenphp_method_trace,
+	"PATCH":   C.frankenphp_method_patch,
+}