diff --git a/ext/odbc/php_odbc.c b/ext/odbc/php_odbc.c
index 368f37fd885..b1594150a68 100644
--- a/ext/odbc/php_odbc.c
+++ b/ext/odbc/php_odbc.c
@@ -34,7 +34,7 @@
 #include "php_globals.h"
 #include "odbc_arginfo.h"
 
-#if HAVE_UODBC
+#ifdef HAVE_UODBC
 
 #include <fcntl.h>
 #include "ext/standard/head.h"
diff --git a/ext/odbc/php_odbc.h b/ext/odbc/php_odbc.h
index 93a16594008..a7c34c7bb22 100644
--- a/ext/odbc/php_odbc.h
+++ b/ext/odbc/php_odbc.h
@@ -19,7 +19,7 @@
 #ifndef PHP_ODBC_H
 #define PHP_ODBC_H
 
-#if HAVE_UODBC
+#ifdef HAVE_UODBC
 
 #ifdef ZTS
 #include "TSRM.h"
diff --git a/ext/odbc/php_odbc_includes.h b/ext/odbc/php_odbc_includes.h
index 5e2e83e7b23..1d7da735289 100644
--- a/ext/odbc/php_odbc_includes.h
+++ b/ext/odbc/php_odbc_includes.h
@@ -19,7 +19,7 @@
 #ifndef PHP_ODBC_INCLUDES_H
 #define PHP_ODBC_INCLUDES_H
 
-#if HAVE_UODBC
+#ifdef HAVE_UODBC
 
 /* checking in the same order as in configure.ac */