diff --git a/src/user/Makefile.am b/src/user/Makefile.am
index 936fb146..f937dcc3 100644
--- a/src/user/Makefile.am
+++ b/src/user/Makefile.am
@@ -35,6 +35,7 @@ IMPOSE_OBJS = sceImpose_0000.o sceImpose_0001.o sceImpose_0002.o sceImpose_0003.
 libpspuserincludedir = @PSPSDK_INCLUDEDIR@
 libpspuserinclude_HEADERS =	\
 	pspiofilemgr.h		\
+	pspiofilemgr_devctl.h	\
 	pspiofilemgr_dirent.h	\
 	pspiofilemgr_fcntl.h	\
 	pspiofilemgr_stat.h	\
diff --git a/src/user/pspiofilemgr.h b/src/user/pspiofilemgr.h
index 95b1a37f..6f1b7177 100644
--- a/src/user/pspiofilemgr.h
+++ b/src/user/pspiofilemgr.h
@@ -17,6 +17,7 @@
 #include <pspiofilemgr_fcntl.h>
 #include <pspiofilemgr_stat.h>
 #include <pspiofilemgr_dirent.h>
+#include <pspiofilemgr_devctl.h>
 
 /** @defgroup FileIO File IO Library 
  *  This module contains the imports for the kernel's IO routines.
diff --git a/src/user/pspiofilemgr_devctl.h b/src/user/pspiofilemgr_devctl.h
new file mode 100644
index 00000000..c91e7200
--- /dev/null
+++ b/src/user/pspiofilemgr_devctl.h
@@ -0,0 +1,36 @@
+/*
+ * PSP Software Development Kit - https://github.com/pspdev
+ * -----------------------------------------------------------------------
+ * Licensed under the BSD license, see LICENSE in PSPSDK root for details.
+ *
+ * pspiofilemgr_devctl.h - File attributes and directory entries.
+ *
+ */
+
+#ifndef PSPIOFILEMGR_DEVCTL_H
+#define PSPIOFILEMGR_DEVCTL_H
+
+#include <psptypes.h>
+
+/* This sceIoDevctl command gets the device capacity. */
+#define SCE_PR_GETDEV 0x02425818
+
+/* This structure stores the device capacity using SCE_PR_GETDEV in sceIoDevctl */
+typedef struct SceDevInf {
+    /* max logical cluster x unit */
+    uint32_t maxClusters;
+    /* number of empty clusters */
+    uint32_t freeClusters;
+    /* cluster of empty logical block */
+    uint32_t maxSectors;
+    /* bytes x logical sector */
+    int32_t sectorSize;
+    /* sector x cluster */
+    int32_t sectorCount;
+} SceDevInf;
+
+typedef struct SceDevctlCmd {
+    SceDevInf *dev_inf;
+} SceDevctlCmd;
+
+#endif /* PSPIOFILEMGR_DEVCTL_H */