diff --git a/src/libsysprof-capture/sysprof-capture-cursor.h b/src/libsysprof-capture/sysprof-capture-cursor.h
index 5d5693b5..dc4b76ab 100644
--- a/src/libsysprof-capture/sysprof-capture-cursor.h
+++ b/src/libsysprof-capture/sysprof-capture-cursor.h
@@ -64,8 +64,6 @@
 
 SYSPROF_BEGIN_DECLS
 
-typedef struct _SysprofCaptureCursor SysprofCaptureCursor;
-
 /**
  * SysprofCaptureCursorCallback:
  *
diff --git a/src/libsysprof-capture/sysprof-capture-reader.h b/src/libsysprof-capture/sysprof-capture-reader.h
index c802e0a5..0fdd8b37 100644
--- a/src/libsysprof-capture/sysprof-capture-reader.h
+++ b/src/libsysprof-capture/sysprof-capture-reader.h
@@ -64,8 +64,6 @@
 
 SYSPROF_BEGIN_DECLS
 
-typedef struct _SysprofCaptureReader SysprofCaptureReader;
-
 SYSPROF_AVAILABLE_IN_ALL
 SysprofCaptureReader               *sysprof_capture_reader_new                 (const char                *filename);
 SYSPROF_AVAILABLE_IN_ALL
diff --git a/src/libsysprof-capture/sysprof-capture-writer.h b/src/libsysprof-capture/sysprof-capture-writer.h
index e92007df..8a65726e 100644
--- a/src/libsysprof-capture/sysprof-capture-writer.h
+++ b/src/libsysprof-capture/sysprof-capture-writer.h
@@ -65,8 +65,6 @@
 
 SYSPROF_BEGIN_DECLS
 
-typedef struct _SysprofCaptureWriter SysprofCaptureWriter;
-
 SYSPROF_AVAILABLE_IN_ALL
 SysprofCaptureWriter *sysprof_capture_writer_new_from_env                    (size_t                             buffer_size);
 SYSPROF_AVAILABLE_IN_ALL