diff --git a/src/passcheck.c b/src/passcheck.c
index 9e4f76f..9364cce 100644
--- a/src/passcheck.c
+++ b/src/passcheck.c
@@ -81,7 +81,7 @@ static const char *passcheck_shmem_name = "pgtle_passcheck";
 
 
 /*  This should match crypt.h */
-char	   *pass_types[3] = {"PASSWORD_TYPE_PLAINTEXT", "PASSWORD_TYPE_MD5", "PASSWORD_TYPE_SCRAM_SHA_256"};
+static char *pass_types[3] = {"PASSWORD_TYPE_PLAINTEXT", "PASSWORD_TYPE_MD5", "PASSWORD_TYPE_SCRAM_SHA_256"};
 
 /* Represents password_check_hook parameters. */
 typedef struct PasswordCheckHookData
diff --git a/src/tleextension.c b/src/tleextension.c
index 91b92d1..d1b1439 100644
--- a/src/tleextension.c
+++ b/src/tleextension.c
@@ -139,10 +139,10 @@ typedef struct ExtensionVersionInfo
 } ExtensionVersionInfo;
 
 /* callback to cleanup on abort */
-bool		cb_registered = false;
+static bool cb_registered = false;
 
 /* global indicator we are manipulating pg_tle artifacts */
-bool		tleart = false;
+static bool tleart = false;
 #define SET_TLEART \
 	do { \
 		if (!cb_registered) \
@@ -158,7 +158,7 @@ bool		tleart = false;
 	} while (0)
 
 /* global indicator to use tle strings rather than files */
-bool		tleext = false;
+static bool tleext = false;
 #define SET_TLEEXT \
 	do { \
 		if (!cb_registered) \