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-rw-r--r--libdecnumber/decimal64.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/libdecnumber/decimal64.h b/libdecnumber/decimal64.h
index 7416f549c07..cb7810bbf0e 100644
--- a/libdecnumber/decimal64.h
+++ b/libdecnumber/decimal64.h
@@ -97,11 +97,11 @@ typedef struct
/* String conversions */
decimal64 *decimal64FromString (decimal64 *, const char *, decContext *);
-char *decimal64ToString (decimal64 *, char *);
-char *decimal64ToEngString (decimal64 *, char *);
+char *decimal64ToString (const decimal64 *, char *);
+char *decimal64ToEngString (const decimal64 *, char *);
/* decNumber conversions */
-decimal64 *decimal64FromNumber (decimal64 *, decNumber *, decContext *);
-decNumber *decimal64ToNumber (decimal64 *, decNumber *);
+decimal64 *decimal64FromNumber (decimal64 *, const decNumber *, decContext *);
+decNumber *decimal64ToNumber (const decimal64 *, decNumber *);
#endif