diff --git a/apps/main.c b/apps/main.c
index b189ea2261..6622094e13 100644
--- a/apps/main.c
+++ b/apps/main.c
@@ -660,8 +660,8 @@ static void init(void)
             for (int i = 0 ; i < NUM_VOLUMES ; i++) {
                 disk_partinfo(i, &pinfo);
                 if (pinfo.type)
-                    lcd_putsf(0, line++, "P%d T%02x S%08lx",
-                              i, pinfo.type, pinfo.size);
+                    lcd_putsf(0, line++, "P%d T%02x S%llx",
+                              i, pinfo.type, (unsigned long long)pinfo.size);
             }
             lcd_update();
 
diff --git a/bootloader/common.c b/bootloader/common.c
index 7ef5d4fb32..0770237d68 100644
--- a/bootloader/common.c
+++ b/bootloader/common.c
@@ -121,8 +121,8 @@ void error(int errortype, int error, bool shutdown)
             struct partinfo pinfo;
             disk_partinfo(i, &pinfo);
             if (pinfo.type)
-                printf("P%d T%02x S%08lx",
-                       i, pinfo.type, pinfo.size);
+                printf("P%d T%02x S%llx",
+                       i, pinfo.type, (unsigned long long)pinfo.size);
         }
 #endif
         break;
diff --git a/bootloader/ipod-s5l87xx.c b/bootloader/ipod-s5l87xx.c
index 827831fcca..44674c571a 100644
--- a/bootloader/ipod-s5l87xx.c
+++ b/bootloader/ipod-s5l87xx.c
@@ -954,8 +954,8 @@ void main(void)
         for (int i = 0 ; i < NUM_VOLUMES ; i++) {
             disk_partinfo(i, &pinfo);
             if (pinfo.type)
-                printf("P%d T%02x S%08lx",
-                       i, pinfo.type, pinfo.size);
+                printf("P%d T%02x S%llx",
+                       i, pinfo.type, (unsigned long long)pinfo.size);
         }
         fatal_error(ERR_RB);
     }
diff --git a/bootloader/ipod.c b/bootloader/ipod.c
index 0f70d2b7ef..8b7127c605 100644
--- a/bootloader/ipod.c
+++ b/bootloader/ipod.c
@@ -377,8 +377,8 @@ void* main(void)
         for (int i = 0 ; i < NUM_VOLUMES ; i++) {
             disk_partinfo(i, &pinfo);
             if (pinfo.type)
-                printf("P%d T%02x S%08lx",
-                       i, pinfo.type, pinfo.size);
+                printf("P%d T%02x S%lllx",
+                       i, pinfo.type, (unsigned long long)pinfo.size);
         }
 
         printf("No partition found");
diff --git a/bootloader/iriver_h1x0.c b/bootloader/iriver_h1x0.c
index 1bf41b5a8c..b6f09a0e09 100644
--- a/bootloader/iriver_h1x0.c
+++ b/bootloader/iriver_h1x0.c
@@ -567,8 +567,8 @@ void main(void)
         for (int i = 0 ; i < NUM_VOLUMES ; i++) {
             disk_partinfo(i, &pinfo);
             if (pinfo.type)
-                printf("P%d T%02x S%08lx",
-                       i, pinfo.type, pinfo.size);
+                printf("P%d T%02x S%llx",
+                       i, pinfo.type, (unsigned long long)pinfo.size);
         }
         while(button_get(true) != SYS_USB_CONNECTED) {};
     }
diff --git a/bootloader/iriver_h300.c b/bootloader/iriver_h300.c
index 7ba78f9d7f..6810a447c3 100644
--- a/bootloader/iriver_h300.c
+++ b/bootloader/iriver_h300.c
@@ -627,8 +627,8 @@ void main(void)
         for (int i = 0 ; i < NUM_VOLUMES ; i++) {
             disk_partinfo(i, &pinfo);
             if (pinfo.type)
-                printf("P%d T%02x S%08lx",
-                       i, pinfo.type, pinfo.size);
+                printf("P%d T%02x S%llx",
+                       i, pinfo.type, (unsigned long long)pinfo.size);
         }
         while(button_get(true) != SYS_USB_CONNECTED) {};
     }