diff --git a/src/third_party/asn1/asn_internal.h b/src/third_party/asn1/asn_internal.h
index 249d7ef6..98669622 100644
--- a/src/third_party/asn1/asn_internal.h
+++ b/src/third_party/asn1/asn_internal.h
@@ -20,7 +20,7 @@ extern "C" {
 #endif
 
 /* Environment version might be used to avoid running with the old library */
-#define	ASN1C_ENVIRONMENT_VERSION	922	/* Compile-time version */
+#define	ASN1C_ENVIRONMENT_VERSION	923	/* Compile-time version */
 int get_asn1c_environment_version(void);	/* Run-time version */
 
 #define	CALLOC(nmemb, size)	calloc(nmemb, size)
diff --git a/src/third_party/asn1/asn_system.h b/src/third_party/asn1/asn_system.h
index d391b7b7..a992230b 100644
--- a/src/third_party/asn1/asn_system.h
+++ b/src/third_party/asn1/asn_system.h
@@ -46,7 +46,7 @@ typedef	unsigned char	uint8_t;
 typedef	unsigned short	uint16_t;
 typedef	unsigned int	uint32_t;
 #endif	/* ASSUMESTDTYPES */
-#define _WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <float.h>
 #define isnan _isnan