diff --git a/sapi/apache2handler/sapi_apache2.c b/sapi/apache2handler/sapi_apache2.c
index 289b59ae2fc..4c69fa6b4d5 100644
--- a/sapi/apache2handler/sapi_apache2.c
+++ b/sapi/apache2handler/sapi_apache2.c
@@ -123,15 +123,15 @@ php_apache_sapi_header_handler(sapi_header_struct *sapi_header, sapi_header_op_e
 				}
 				ctx->content_type = estrdup(val);
 			} else if (!strcasecmp(sapi_header->header, "content-length")) {
-#ifdef PHP_WIN32
-# ifdef APR_HAS_LARGE_FILES
-				ap_set_content_length(ctx->r, (apr_off_t) _strtoui64(val, (char **)NULL, 10));
-# else
-				ap_set_content_length(ctx->r, (apr_off_t) strtol(val, (char **)NULL, 10));
-# endif
-#else
-				ap_set_content_length(ctx->r, (apr_off_t) strtol(val, (char **)NULL, 10));
-#endif
+				apr_off_t clen = 0;
+
+				if (APR_SUCCESS != apr_strtoff(&clen, val, (char **) NULL, 10)) {
+					/* We'll fall back to strtol, since that's what we used to
+					 * do anyway. */
+					clen = (apr_off_t) strtol(val, (char **) NULL, 10);
+				}
+
+				ap_set_content_length(ctx->r, clen);
 			} else if (op == SAPI_HEADER_REPLACE) {
 				apr_table_set(ctx->r->headers_out, sapi_header->header, val);
 			} else {