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-rw-r--r--ext/bigdecimal/bigdecimal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/bigdecimal/bigdecimal.h b/ext/bigdecimal/bigdecimal.h
index a30a08e615..c8a1feb30e 100644
--- a/ext/bigdecimal/bigdecimal.h
+++ b/ext/bigdecimal/bigdecimal.h
@@ -211,7 +211,7 @@ VP_EXPORT Real *VpOne(void);
#define VpExponent(a) (a->exponent)
#ifdef _DEBUG
int VpVarCheck(Real * v);
-VP_EXPORT int VPrint(FILE *fp,char *cntl_chr,Real *a);
+VP_EXPORT int VPrint(FILE *fp,const char *cntl_chr,Real *a);
#endif /* _DEBUG */
#if defined(__cplusplus)