diff --git a/src/include/port/pg_bitutils.h b/src/include/port/pg_bitutils.h
index 799f70d0526..46bf4f01038 100644
--- a/src/include/port/pg_bitutils.h
+++ b/src/include/port/pg_bitutils.h
@@ -300,8 +300,8 @@ pg_ceil_log2_64(uint64 num)
 
 #ifdef TRY_POPCNT_FAST
 /* Attempt to use the POPCNT instruction, but perform a runtime check first */
-extern int	(*pg_popcount32) (uint32 word);
-extern int	(*pg_popcount64) (uint64 word);
+extern PGDLLIMPORT int (*pg_popcount32) (uint32 word);
+extern PGDLLIMPORT int (*pg_popcount64) (uint64 word);
 
 #else
 /* Use a portable implementation -- no need for a function pointer. */
diff --git a/src/test/modules/test_radixtree/test_radixtree.c b/src/test/modules/test_radixtree/test_radixtree.c
index 8010e0a1f15..d301c60d000 100644
--- a/src/test/modules/test_radixtree/test_radixtree.c
+++ b/src/test/modules/test_radixtree/test_radixtree.c
@@ -1,7 +1,7 @@
 /*--------------------------------------------------------------------------
  *
  * test_radixtree.c
- *		Test module for adapive radix tree.
+ *		Test module for adaptive radix tree.
  *
  * Copyright (c) 2024, PostgreSQL Global Development Group
  *