1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/libcrypto/ripemd/rmd_dgst.c b/src/lib/libcrypto/ripemd/rmd_dgst.c
index ead11d075a..a845e17ed8 100644
--- a/src/lib/libcrypto/ripemd/rmd_dgst.c
+++ b/src/lib/libcrypto/ripemd/rmd_dgst.c
@@ -94,7 +94,7 @@ FIPS_NON_FIPS_MD_Init(RIPEMD160)
 void ripemd160_block_data_order (RIPEMD160_CTX *ctx, const void *p, size_t num)
         {
         const unsigned char *data=p;
-        register unsigned MD32_REG_T A,B,C,D,E;
+        register volatile unsigned MD32_REG_T A,B,C,D,E;
         unsigned MD32_REG_T a,b,c,d,e,l;
 #ifndef MD32_XARRAY
         /* See comment in crypto/sha/sha_locl.h for details. */