diff --git a/src/backend/utils/adt/numeric.c b/src/backend/utils/adt/numeric.c
index 74335f76f5c..f50da658a63 100644
--- a/src/backend/utils/adt/numeric.c
+++ b/src/backend/utils/adt/numeric.c
@@ -8182,7 +8182,7 @@ power_var_int(NumericVar *base, int exp, NumericVar *result, int rscale)
 	 * to around log10(abs(exp)) digits, so work with this many extra digits
 	 * of precision (plus a few more for good measure).
 	 */
-	sig_digits += (int) log(Abs(exp)) + 8;
+	sig_digits += (int) log(fabs(exp)) + 8;
 
 	/*
 	 * Now we can proceed with the multiplications.
diff --git a/src/test/regress/expected/numeric.out b/src/test/regress/expected/numeric.out
index 35a0f9cd42d..ae1daa5744e 100644
--- a/src/test/regress/expected/numeric.out
+++ b/src/test/regress/expected/numeric.out
@@ -1506,6 +1506,12 @@ select 0.12 ^ (-20);
  2608405330458882702.5529619561355838
 (1 row)
 
+select 1.000000000123 ^ (-2147483648);
+      ?column?      
+--------------------
+ 0.7678656556403084
+(1 row)
+
 -- cases that used to error out
 select 0.12 ^ (-25);
                  ?column?                  
diff --git a/src/test/regress/sql/numeric.sql b/src/test/regress/sql/numeric.sql
index c2d73c2d0b9..d6ff9b8a399 100644
--- a/src/test/regress/sql/numeric.sql
+++ b/src/test/regress/sql/numeric.sql
@@ -873,6 +873,7 @@ select 3.789 ^ 21;
 select 3.789 ^ 35;
 select 1.2 ^ 345;
 select 0.12 ^ (-20);
+select 1.000000000123 ^ (-2147483648);
 
 -- cases that used to error out
 select 0.12 ^ (-25);