diff --git a/dlls/msvcp60/ios.c b/dlls/msvcp60/ios.c
index ff3ddd95a3b..f5dabbfa42a 100644
--- a/dlls/msvcp60/ios.c
+++ b/dlls/msvcp60/ios.c
@@ -4214,7 +4214,7 @@ fpos_int* __thiscall basic_stringbuf_char_seekpos(basic_stringbuf_char *this,
         return ret;
     }
 
-    return basic_stringbuf_char_seekoff(this, ret, pos.off, SEEKDIR_beg, mode);
+    return basic_stringbuf_char_seekoff(this, ret, pos.pos+pos.off, SEEKDIR_beg, mode);
 }
 
 /* ?str@?$basic_stringbuf@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z */
@@ -4635,7 +4635,7 @@ fpos_int* __thiscall basic_stringbuf_wchar_seekpos(basic_stringbuf_wchar *this,
         return ret;
     }
 
-    return basic_stringbuf_wchar_seekoff(this, ret, pos.off, SEEKDIR_beg, mode);
+    return basic_stringbuf_wchar_seekoff(this, ret, pos.pos+pos.off, SEEKDIR_beg, mode);
 }
 
 /* ?str@?$basic_stringbuf@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXABV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@2@@Z */
@@ -13382,7 +13382,7 @@ fpos_int* __thiscall strstreambuf_seekpos(strstreambuf *this, fpos_int *ret, fpo
         return ret;
     }
 
-    return strstreambuf_seekoff(this, ret, pos.off, SEEKDIR_beg, mode);
+    return strstreambuf_seekoff(this, ret, pos.pos+pos.off, SEEKDIR_beg, mode);
 }
 
 /* ?underflow@strstreambuf@std@@MAEHXZ */
diff --git a/dlls/msvcp90/ios.c b/dlls/msvcp90/ios.c
index 53c10896520..c3477a4cadf 100644
--- a/dlls/msvcp90/ios.c
+++ b/dlls/msvcp90/ios.c
@@ -4350,7 +4350,7 @@ fpos_int* __thiscall basic_stringbuf_char_seekpos(basic_stringbuf_char *this,
         return ret;
     }
 
-    return basic_stringbuf_char_seekoff(this, ret, pos.off, SEEKDIR_beg, mode);
+    return basic_stringbuf_char_seekoff(this, ret, pos.pos+pos.off, SEEKDIR_beg, mode);
 }
 
 /* ?str@?$basic_stringbuf@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEXABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z */
@@ -4771,7 +4771,7 @@ fpos_int* __thiscall basic_stringbuf_wchar_seekpos(basic_stringbuf_wchar *this,
         return ret;
     }
 
-    return basic_stringbuf_wchar_seekoff(this, ret, pos.off, SEEKDIR_beg, mode);
+    return basic_stringbuf_wchar_seekoff(this, ret, pos.pos+pos.off, SEEKDIR_beg, mode);
 }
 
 /* ?str@?$basic_stringbuf@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXABV?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@2@@Z */
@@ -13954,7 +13954,7 @@ fpos_int* __thiscall strstreambuf_seekpos(strstreambuf *this, fpos_int *ret, fpo
         return ret;
     }
 
-    return strstreambuf_seekoff(this, ret, pos.off, SEEKDIR_beg, mode);
+    return strstreambuf_seekoff(this, ret, pos.pos+pos.off, SEEKDIR_beg, mode);
 }
 
 /* ?underflow@strstreambuf@std@@MAEHXZ */