diff --git a/src/sentry/api/event_search.py b/src/sentry/api/event_search.py
index 1a1d7f403cf6..900a3c4b59f4 100644
--- a/src/sentry/api/event_search.py
+++ b/src/sentry/api/event_search.py
@@ -158,7 +158,8 @@
 
 aggregate_key                    = key open_paren spaces function_args? spaces closed_paren
 function_args                    = aggregate_param (spaces comma spaces !comma aggregate_param?)*
-aggregate_param                  = explicit_tag_key_aggregate_param / quoted_aggregate_param / raw_aggregate_param
+aggregate_param                  = explicit_tag_key_aggregate_param / query_aggregate_param / quoted_aggregate_param / raw_aggregate_param
+query_aggregate_param            = "`" (quoted_value / ~r"[^`\"]+")* "`"
 raw_aggregate_param              = ~r"[^()\t\n, \"]+"
 quoted_aggregate_param           = '"' ('\\"' / ~r'[^\t\n\"]')* '"'
 explicit_tag_key_aggregate_param = explicit_tag_key / explicit_number_tag_key / explicit_string_tag_key / explicit_boolean_tag_key
@@ -1642,6 +1643,9 @@ def visit_function_args(
     def visit_aggregate_param(self, node: Node, children: tuple[str]) -> str:
         return children[0]
 
+    def visit_query_aggregate_param(self, node: Node, children: object) -> str:
+        return node.text
+
     def visit_raw_aggregate_param(self, node: Node, children: object) -> str:
         return node.text
 
diff --git a/tests/sentry/api/test_event_search.py b/tests/sentry/api/test_event_search.py
index afe449755524..bff671b3c071 100644
--- a/tests/sentry/api/test_event_search.py
+++ b/tests/sentry/api/test_event_search.py
@@ -349,6 +349,21 @@ def test_paren_expression(self) -> None:
             SearchFilter(key=SearchKey(name="z"), operator="=", value=SearchValue(raw_value="1")),
         ]
 
+    def test_conditional_aggregate_query_argument(self) -> None:
+        for predicate in [
+            "x:1 AND (y:2 OR z:3)",
+            'span.description:"hello world"',
+            'gen_ai.tool.name:["search docs",calculator]',
+            r'span.description:"say \"hello\""',
+        ]:
+            assert parse_search_query(f"count_if(`{predicate}`,span.duration):>0") == [
+                AggregateFilter(
+                    key=AggregateKey(f"count_if(`{predicate}`, span.duration)"),
+                    operator=">",
+                    value=SearchValue(0.0),
+                )
+            ]
+
     def test_paren_expression_of_empty_string(self) -> None:
         assert parse_search_query('("")') == parse_search_query('""') == []