diff --git a/vpi/fstapi.c b/vpi/fstapi.c
index 4fdb943f2..bac88f44c 100644
--- a/vpi/fstapi.c
+++ b/vpi/fstapi.c
@@ -84,8 +84,10 @@ void **JenkinsIns(void *base_i, unsigned char *mem, uint32_t length, uint32_t ha
 
 #ifdef __MINGW32__
 #include <io.h>
-/* #define ftello ftell */
-/* #define fseeko fseek */
+#ifndef HAVE_FSEEKO
+#define ftello ftell
+#define fseeko fseek
+#endif
 #endif