diff --git a/poi/src/main/java/org/apache/poi/ss/formula/functions/FloorMath.java b/poi/src/main/java/org/apache/poi/ss/formula/functions/FloorMath.java
index 0b0d13928b..71376f4cb1 100644
--- a/poi/src/main/java/org/apache/poi/ss/formula/functions/FloorMath.java
+++ b/poi/src/main/java/org/apache/poi/ss/formula/functions/FloorMath.java
@@ -62,12 +62,14 @@ public final class FloorMath implements FreeRefFunction {
             }
             if (roundNegativeNumsDown && xval < 0.0) {
                 if (multiplier != 1.0) {
-                    return new NumberEval(scaledRoundUsingBigDecimal(xval, multiplier, RoundingMode.CEILING));
+                    RoundingMode mode = multiplier < 0.0 ? RoundingMode.FLOOR : RoundingMode.CEILING;
+                    return new NumberEval(scaledRoundUsingBigDecimal(xval, multiplier, mode));
                 }
                 return new NumberEval(Math.ceil(xval));
             }
             if (multiplier != 1.0) {
-                return new NumberEval(scaledRoundUsingBigDecimal(xval, multiplier, RoundingMode.FLOOR));
+                RoundingMode mode = multiplier < 0.0 ? RoundingMode.CEILING : RoundingMode.FLOOR;
+                return new NumberEval(scaledRoundUsingBigDecimal(xval, multiplier, mode));
             }
             return new NumberEval(Math.floor(xval));
         } catch (EvaluationException evaluationException) {
diff --git a/poi/src/test/java/org/apache/poi/ss/formula/functions/TestFloorMath.java b/poi/src/test/java/org/apache/poi/ss/formula/functions/TestFloorMath.java
index b171261969..8973fe7146 100644
--- a/poi/src/test/java/org/apache/poi/ss/formula/functions/TestFloorMath.java
+++ b/poi/src/test/java/org/apache/poi/ss/formula/functions/TestFloorMath.java
@@ -47,6 +47,10 @@ final class TestFloorMath {
             assertDouble(fe, cell, "FLOOR.MATH(6.7)", 6.0, 0.00000000000001);
             assertDouble(fe, cell, "FLOOR.MATH(-8.1,2)", -10.0, 0.00000000000001);
             assertDouble(fe, cell, "FLOOR.MATH(-5.5,2,-1)", -4.0, 0.00000000000001);
+
+            assertDouble(fe, cell, "FLOOR.MATH(-2.5,-2)", -4.0, 0.00000000000001);
+            assertDouble(fe, cell, "FLOOR.MATH(-2.5,-2,-1)", -2.0, 0.00000000000001);
+            assertDouble(fe, cell, "FLOOR.MATH(2.5,-2)", 2.0, 0.00000000000001);
         }
     }