diff --git a/setup.cfg b/setup.cfg
index 7fe43b9..cae5cef 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = ep-stats
-version = 1.3.1
+version = 1.3.2
 description = Statistical package to evaluate ab tests in experimentation platform.
 long_description = file: README.md
 long_description_content_type = text/markdown
diff --git a/src/epstats/toolkit/statistics.py b/src/epstats/toolkit/statistics.py
index 56eff37..b408363 100644
--- a/src/epstats/toolkit/statistics.py
+++ b/src/epstats/toolkit/statistics.py
@@ -111,7 +111,7 @@ def ttest_evaluation(cls, stats: np.array, control_variant: str) -> pd.DataFrame
                 # We fill in zeros, when goal data are missing for some variant.
                 # There could be division by zero here which is expected as we return
                 # nan or inf values to the caller.
-                rel_diff = (mean_treat - mean_cont) / mean_cont
+                rel_diff = (mean_treat - mean_cont) / np.abs(mean_cont)
                 # standard error for relative difference
                 rel_se = (
                     np.sqrt(