diff --git a/winpr/libwinpr/crypto/md4.c b/winpr/libwinpr/crypto/md4.c
index c33aea334..bae63e08f 100644
--- a/winpr/libwinpr/crypto/md4.c
+++ b/winpr/libwinpr/crypto/md4.c
@@ -72,7 +72,7 @@
  * their own translation unit avoids the problem.
  */
 #if defined(__i386__) || defined(__x86_64__) || defined(__vax__)
-#define SET(n) (*(winpr_MD4_u32plus*)&ptr[(n)*4])
+#define SET(n) (*(const winpr_MD4_u32plus*)&ptr[(n)*4])
 #define GET(n) SET(n)
 #else
 #define SET(n)                                                                                    \
diff --git a/winpr/libwinpr/crypto/md5.c b/winpr/libwinpr/crypto/md5.c
index 96e8282a3..818cdf8e6 100644
--- a/winpr/libwinpr/crypto/md5.c
+++ b/winpr/libwinpr/crypto/md5.c
@@ -76,7 +76,7 @@
  * their own translation unit avoids the problem.
  */
 #if defined(__i386__) || defined(__x86_64__) || defined(__vax__)
-#define SET(n) (*(winpr_MD5_u32plus*)&ptr[(n)*4])
+#define SET(n) (*(const winpr_MD5_u32plus*)&ptr[(n)*4])
 #define GET(n) SET(n)
 #else
 #define SET(n)                                                                                    \