diff --git a/kalpaa/read_bin_csv.py b/kalpaa/read_bin_csv.py
index c1cf2a0..9361fba 100644
--- a/kalpaa/read_bin_csv.py
+++ b/kalpaa/read_bin_csv.py
@@ -125,7 +125,7 @@ def _reshape_dots_dict(dots_dict: typing.Sequence[typing.Dict]) -> typing.Dict:
 
 
 BINNED_HEADER_REGEX = r"\s*APSD_(?P<measurement_type>\w+)_(?P<dot_name>\w+)_(?P<summary_stat>mean|stdev)\s*"
-PAIR_MEASUREMENT_BINNED_HEADER_REGEX = r"\s*APSD_(?P<measurement_type>\w+)_(?P<dot_name1>\w+)_(?P<dot_name2>\w+)_(?P<summary_stat>mean|stdev)\s*"
+PAIR_MEASUREMENT_BINNED_HEADER_REGEX = r"\s*APSD_(?P<measurement_type>\w+)_(?P<dot_name>\w+)_(?P<dot_name2>\w+)_(?P<summary_stat>mean|stdev)\s*"
 
 
 @dataclasses.dataclass
@@ -134,6 +134,8 @@ class ParsedBinHeader:
 	measurement_type: str
 	summary_stat: str
 	dot_name: str
+	# only used for pair measurements
+	dot_name2: typing.Optional[str] = None
 
 
 def _parse_bin_header(field: str) -> typing.Optional[ParsedBinHeader]:
diff --git a/tests/read_bin_csv/__snapshots__/test_read_bin_csv.ambr b/tests/read_bin_csv/__snapshots__/test_read_bin_csv.ambr
index 7bf37c3..0f4cf47 100644
--- a/tests/read_bin_csv/__snapshots__/test_read_bin_csv.ambr
+++ b/tests/read_bin_csv/__snapshots__/test_read_bin_csv.ambr
@@ -220,66 +220,77 @@
   list([
     dict({
       'dot_name': 'dot1',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_dot1_mean',
       'summary_stat': 'mean',
     }),
     dict({
       'dot_name': 'dot1',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_dot1_stdev',
       'summary_stat': 'stdev',
     }),
     dict({
       'dot_name': 'dot2',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_dot2_mean',
       'summary_stat': 'mean',
     }),
     dict({
       'dot_name': 'dot2',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_dot2_stdev',
       'summary_stat': 'stdev',
     }),
     dict({
       'dot_name': 'line',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_line_mean',
       'summary_stat': 'mean',
     }),
     dict({
       'dot_name': 'line',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_line_stdev',
       'summary_stat': 'stdev',
     }),
     dict({
       'dot_name': 'triangle1',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_triangle1_mean',
       'summary_stat': 'mean',
     }),
     dict({
       'dot_name': 'triangle1',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_triangle1_stdev',
       'summary_stat': 'stdev',
     }),
     dict({
       'dot_name': 'triangle2',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_triangle2_mean',
       'summary_stat': 'mean',
     }),
     dict({
       'dot_name': 'triangle2',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_triangle2_stdev',
       'summary_stat': 'stdev',
     }),
     dict({
       'dot_name': 'uprise1',
+      'dot_name2': None,
       'measurement_type': 'V',
       'original_field': 'APSD_V_uprise1_mean',
       'summary_stat': 'mean',