diff --git a/osslsigncode.c b/osslsigncode.c
index aacd4f9..50b41d3 100644
--- a/osslsigncode.c
+++ b/osslsigncode.c
@@ -1587,9 +1587,11 @@ static u_char *pe_calc_page_hash(char *indata, uint32_t header_size,
 	}
 	/* SectionAlignment is the alignment (in bytes) of sections when they are
 	 * loaded into memory. It must be greater than or equal to FileAlignment.
-	 * The default is the page size for the architecture. */
+	 * The default is the page size for the architecture.
+	 * The large page size is at most 4 MB.
+	 * https://devblogs.microsoft.com/oldnewthing/20210510-00/?p=105200 */
 	pagesize = GET_UINT32_LE(indata + header_size + 56);
-	if (pagesize < alignment || pagesize > UINT32_MAX) {
+	if (pagesize < alignment || pagesize > 4194304) {
 		printf("Corrupted page size: 0x%08X\n", pagesize);
 		return NULL; /* FAILED */
 	}