diff --git a/crypto/armcap.c b/crypto/armcap.c
index 29534845d1..baa2d3d257 100644
--- a/crypto/armcap.c
+++ b/crypto/armcap.c
@@ -97,7 +97,7 @@ static unsigned long (*getauxval) (unsigned long) = NULL;
 
 void OPENSSL_cpuid_setup(void)
 {
-    char *e;
+    const char *e;
     struct sigaction ill_oact, ill_act;
     sigset_t oset;
     static int trigger = 0;