1 files changed, 2 insertions, 2 deletions

diff --git a/src/lib/libcrypto/asn1/a_bool.c b/src/lib/libcrypto/asn1/a_bool.c
index 24333ea4d5..331acdf053 100644
--- a/src/lib/libcrypto/asn1/a_bool.c
+++ b/src/lib/libcrypto/asn1/a_bool.c
@@ -75,10 +75,10 @@ int i2d_ASN1_BOOLEAN(int a, unsigned char **pp)
         return(r);
         }
 
-int d2i_ASN1_BOOLEAN(int *a, unsigned char **pp, long length)
+int d2i_ASN1_BOOLEAN(int *a, const unsigned char **pp, long length)
         {
         int ret= -1;
-        unsigned char *p;
+        const unsigned char *p;
         long len;
         int inf,tag,xclass;
         int i=0;