diff --git a/graphkb/constants.py b/graphkb/constants.py
index ae91b3e..9f443bc 100644
--- a/graphkb/constants.py
+++ b/graphkb/constants.py
@@ -175,7 +175,7 @@ def __getitem__(self, key):
 
 # For match.type_screening() [KBDEV-1056]
 DEFAULT_NON_STRUCTURAL_VARIANT_TYPE = 'mutation'
-STRUCTURAL_VARIANT_SIZE_THRESHOLD = 50  # bp
+STRUCTURAL_VARIANT_SIZE_THRESHOLD = 48  # bp
 STRUCTURAL_VARIANT_TYPES = [
     "structural variant",
     "insertion",