diff --git a/dlls/msvcp90/ios.c b/dlls/msvcp90/ios.c
index 9062760fd52..5bfc4e64caa 100644
--- a/dlls/msvcp90/ios.c
+++ b/dlls/msvcp90/ios.c
@@ -50,42 +50,6 @@ typedef struct {
     streamsize arg;
 } manip_streamsize;
 
-typedef struct {
-    const vtable_ptr *vtable;
-    mutex lock;
-    char *rbuf;
-    char *wbuf;
-    char **prbuf;
-    char **pwbuf;
-    char *rpos;
-    char *wpos;
-    char **prpos;
-    char **pwpos;
-    int rsize;
-    int wsize;
-    int *prsize;
-    int *pwsize;
-    locale *loc;
-} basic_streambuf_char;
-
-typedef struct {
-    const vtable_ptr *vtable;
-    mutex lock;
-    wchar_t *rbuf;
-    wchar_t *wbuf;
-    wchar_t **prbuf;
-    wchar_t **pwbuf;
-    wchar_t *rpos;
-    wchar_t *wpos;
-    wchar_t **prpos;
-    wchar_t **pwpos;
-    int rsize;
-    int wsize;
-    int *prsize;
-    int *pwsize;
-    locale *loc;
-} basic_streambuf_wchar;
-
 typedef enum {
     INITFL_new   = 0,
     INITFL_open  = 1,
diff --git a/dlls/msvcp90/locale.c b/dlls/msvcp90/locale.c
index ca26378b743..94b338490f2 100644
--- a/dlls/msvcp90/locale.c
+++ b/dlls/msvcp90/locale.c
@@ -104,14 +104,14 @@ typedef struct {
 
 typedef struct _istreambuf_iterator_char
 {
-    struct _basic_streambuf_char *strbuf;
+    basic_streambuf_char *strbuf;
     MSVCP_bool      got;
     char            val;
 } istreambuf_iterator_char;
 
 typedef struct _istreambuf_iterator_wchar
 {
-    struct _basic_streambuf_wchar *strbuf;
+    basic_streambuf_wchar *strbuf;
     MSVCP_bool      got;
     wchar_t         val;
 } istreambuf_iterator_wchar;
diff --git a/dlls/msvcp90/msvcp90.h b/dlls/msvcp90/msvcp90.h
index 2dde3300074..e6cffc7762a 100644
--- a/dlls/msvcp90/msvcp90.h
+++ b/dlls/msvcp90/msvcp90.h
@@ -484,5 +484,43 @@ typedef struct _ios_base {
     locale *loc;
 } ios_base;
 
+/* class basic_streambuf<char> */
+typedef struct {
+    const vtable_ptr *vtable;
+    mutex lock;
+    char *rbuf;
+    char *wbuf;
+    char **prbuf;
+    char **pwbuf;
+    char *rpos;
+    char *wpos;
+    char **prpos;
+    char **pwpos;
+    int rsize;
+    int wsize;
+    int *prsize;
+    int *pwsize;
+    locale *loc;
+} basic_streambuf_char;
+
+/* class basic_streambuf<wchar> */
+typedef struct {
+    const vtable_ptr *vtable;
+    mutex lock;
+    wchar_t *rbuf;
+    wchar_t *wbuf;
+    wchar_t **prbuf;
+    wchar_t **pwbuf;
+    wchar_t *rpos;
+    wchar_t *wpos;
+    wchar_t **prpos;
+    wchar_t **pwpos;
+    int rsize;
+    int wsize;
+    int *prsize;
+    int *pwsize;
+    locale *loc;
+} basic_streambuf_wchar;
+
 void init_io(void);
 void free_io(void);