diff --git a/pynetdicom/service_class.py b/pynetdicom/service_class.py
index b0d0665ae..5375d0845 100644
--- a/pynetdicom/service_class.py
+++ b/pynetdicom/service_class.py
@@ -289,7 +289,7 @@ def _c_find_scp(self, req: C_FIND, context: "PresentationContext") -> None:
                 LOGGER.error(
                     "\nTraceback (most recent call last):\n"
                     + "".join(traceback.format_tb(exc[2]))
-                    + f"{exc[0].__name__}: {str(exc[1])}"  # type: ignore
+                    + f"{exc[0].__name__}: {exc[1]}"  # type: ignore
                 )
                 rsp_status = 0xC311
                 dataset = None
@@ -1707,7 +1707,7 @@ def _add_failed_instance(ds: Dataset) -> None:
                 LOGGER.error(
                     "\nTraceback (most recent call last):\n"
                     + "".join(traceback.format_tb(exc[2]))
-                    + f"{exc[0].__name__}: {str(exc[1])}"  # type: ignore
+                    + f"{exc[0].__name__}: {exc[1]}"  # type: ignore
                 )
                 rsp_status = 0xC411
                 dataset = None
@@ -2131,7 +2131,7 @@ def _add_failed_instance(ds: Dataset) -> None:
                 LOGGER.error(
                     "\nTraceback (most recent call last):\n"
                     + "".join(traceback.format_tb(exc[2]))
-                    + f"{exc[0].__name__}: {str(exc[1])}"  # type: ignore
+                    + f"{exc[0].__name__}: {exc[1]}"  # type: ignore
                 )
                 rsp_status = 0xC511
                 dataset = None