diff --git a/fastapi/_compat.py b/fastapi/_compat.py
index 56c5d744e..2b4d3e725 100644
--- a/fastapi/_compat.py
+++ b/fastapi/_compat.py
@@ -27,7 +27,8 @@ from typing_extensions import Annotated, Literal, get_args, get_origin
 
 # Reassign variable to make it reexported for mypy
 PYDANTIC_VERSION = P_VERSION
-PYDANTIC_V2 = PYDANTIC_VERSION.startswith("2.")
+PYDANTIC_VERSION_MINOR_TUPLE = tuple(int(x) for x in PYDANTIC_VERSION.split(".")[:2])
+PYDANTIC_V2 = PYDANTIC_VERSION_MINOR_TUPLE[0] == 2
 
 
 sequence_annotation_to_type = {
diff --git a/fastapi/params.py b/fastapi/params.py
index 90ca7cb01..8f5601dd3 100644
--- a/fastapi/params.py
+++ b/fastapi/params.py
@@ -6,7 +6,11 @@ from fastapi.openapi.models import Example
 from pydantic.fields import FieldInfo
 from typing_extensions import Annotated, deprecated
 
-from ._compat import PYDANTIC_V2, PYDANTIC_VERSION, Undefined
+from ._compat import (
+    PYDANTIC_V2,
+    PYDANTIC_VERSION_MINOR_TUPLE,
+    Undefined,
+)
 
 _Unset: Any = Undefined
 
@@ -105,7 +109,7 @@ class Param(FieldInfo):
                 stacklevel=4,
             )
         current_json_schema_extra = json_schema_extra or extra
-        if PYDANTIC_VERSION < "2.7.0":
+        if PYDANTIC_VERSION_MINOR_TUPLE < (2, 7):
             self.deprecated = deprecated
         else:
             kwargs["deprecated"] = deprecated
@@ -561,7 +565,7 @@ class Body(FieldInfo):
                 stacklevel=4,
             )
         current_json_schema_extra = json_schema_extra or extra
-        if PYDANTIC_VERSION < "2.7.0":
+        if PYDANTIC_VERSION_MINOR_TUPLE < (2, 7):
             self.deprecated = deprecated
         else:
             kwargs["deprecated"] = deprecated