1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib_math.c b/src/lib_math.c
index 87ec2883..225630d0 100644
--- a/src/lib_math.c
+++ b/src/lib_math.c
@@ -57,7 +57,7 @@ LJLIB_ASM(math_log)		LJLIB_REC(math_log)
 #else
     x = lj_vm_log2(x); y = 1.0 / lj_vm_log2(y);
 #endif
-    setnumV(L->base-1, x*y);  /* Do NOT join the expression to x / y. */
+    setnumV(L->base-1-LJ_FR2, x*y);  /* Do NOT join the expression to x / y. */
     return FFH_RES(1);
   }
   return FFH_RETRY;