diff --git a/libisofs/ecma119.c b/libisofs/ecma119.c
index 41ce015..40fd71d 100644
--- a/libisofs/ecma119.c
+++ b/libisofs/ecma119.c
@@ -343,7 +343,7 @@ void write_one_dir_record(Ecma119Image *t, Ecma119Node *node, int file_id,
         iso_datetime_7(rec->recording_time, t->now, t->always_gmt);
     }
     rec->flags[0] = ((node->type == ECMA119_DIR) ? 2 : 0) | (multi_extend ? 0x80 : 0);
-    iso_bb(rec->vol_seq_number, 1, 2);
+    iso_bb(rec->vol_seq_number, (uint32_t) 1, 2);
     rec->len_fi[0] = len_fi;
 
     /*
@@ -421,9 +421,9 @@ int ecma119_writer_write_vol_desc(IsoImageWriter *writer)
     strncpy_pad((char*)vol.system_id, system_id, 32);
     strncpy_pad((char*)vol.volume_id, vol_id, 32);
     iso_bb(vol.vol_space_size, t->vol_space_size, 4);
-    iso_bb(vol.vol_set_size, 1, 2);
-    iso_bb(vol.vol_seq_number, 1, 2);
-    iso_bb(vol.block_size, BLOCK_SIZE, 2);
+    iso_bb(vol.vol_set_size, (uint32_t) 1, 2);
+    iso_bb(vol.vol_seq_number, (uint32_t) 1, 2);
+    iso_bb(vol.block_size, (uint32_t) BLOCK_SIZE, 2);
     iso_bb(vol.path_table_size, t->path_table_size, 4);
     iso_lsb(vol.l_path_table_pos, t->l_path_table_pos, 4);
     iso_msb(vol.m_path_table_pos, t->m_path_table_pos, 4);
diff --git a/libisofs/iso1999.c b/libisofs/iso1999.c
index e09ddf1..72a7430 100644
--- a/libisofs/iso1999.c
+++ b/libisofs/iso1999.c
@@ -712,7 +712,7 @@ void write_one_dir_record(Ecma119Image *t, Iso1999Node *node, int file_id,
     iso_bb(rec->length, len, 4);
     iso_datetime_7(rec->recording_time, t->now, t->always_gmt);
     rec->flags[0] = ((node->type == ISO1999_DIR) ? 2 : 0) | (multi_extend ? 0x80 : 0);
-    iso_bb(rec->vol_seq_number, 1, 2);
+    iso_bb(rec->vol_seq_number, (uint32_t) 1, 2);
     rec->len_fi[0] = len_fi;
 }
 
@@ -763,9 +763,9 @@ int iso1999_writer_write_vol_desc(IsoImageWriter *writer)
     strncpy_pad((char*)vol.volume_id, vol_id, 32);
 
     iso_bb(vol.vol_space_size, t->vol_space_size, 4);
-    iso_bb(vol.vol_set_size, 1, 2);
-    iso_bb(vol.vol_seq_number, 1, 2);
-    iso_bb(vol.block_size, BLOCK_SIZE, 2);
+    iso_bb(vol.vol_set_size, (uint32_t) 1, 2);
+    iso_bb(vol.vol_seq_number, (uint32_t) 1, 2);
+    iso_bb(vol.block_size, (uint32_t) BLOCK_SIZE, 2);
     iso_bb(vol.path_table_size, t->iso1999_path_table_size, 4);
     iso_lsb(vol.l_path_table_pos, t->iso1999_l_path_table_pos, 4);
     iso_msb(vol.m_path_table_pos, t->iso1999_m_path_table_pos, 4);
diff --git a/libisofs/joliet.c b/libisofs/joliet.c
index 160ad47..6f32f52 100644
--- a/libisofs/joliet.c
+++ b/libisofs/joliet.c
@@ -758,7 +758,7 @@ void write_one_dir_record(Ecma119Image *t, JolietNode *node, int file_id,
     iso_bb(rec->length, len, 4);
     iso_datetime_7(rec->recording_time, t->now, t->always_gmt);
     rec->flags[0] = ((node->type == JOLIET_DIR) ? 2 : 0) | (multi_extend ? 0x80 : 0);
-    iso_bb(rec->vol_seq_number, 1, 2);
+    iso_bb(rec->vol_seq_number, (uint32_t) 1, 2);
     rec->len_fi[0] = len_fi;
 }
 
@@ -833,9 +833,9 @@ int joliet_writer_write_vol_desc(IsoImageWriter *writer)
     memcpy(vol.esc_sequences, "%/E", 3);
 
     iso_bb(vol.vol_space_size, t->vol_space_size, 4);
-    iso_bb(vol.vol_set_size, 1, 2);
-    iso_bb(vol.vol_seq_number, 1, 2);
-    iso_bb(vol.block_size, BLOCK_SIZE, 2);
+    iso_bb(vol.vol_set_size, (uint32_t) 1, 2);
+    iso_bb(vol.vol_seq_number, (uint32_t) 1, 2);
+    iso_bb(vol.block_size, (uint32_t) BLOCK_SIZE, 2);
     iso_bb(vol.path_table_size, t->joliet_path_table_size, 4);
     iso_lsb(vol.l_path_table_pos, t->joliet_l_path_table_pos, 4);
     iso_msb(vol.m_path_table_pos, t->joliet_m_path_table_pos, 4);
diff --git a/libisofs/rockridge.c b/libisofs/rockridge.c
index 6d68783..51d9f9e 100644
--- a/libisofs/rockridge.c
+++ b/libisofs/rockridge.c
@@ -109,12 +109,12 @@ int rrip_add_PX(Ecma119Image *t, Ecma119Node *n, struct susp_info *susp)
         PX[2] = 36;
     }
     PX[3] = 1;
-    iso_bb(&PX[4], px_get_mode(t, n), 4);
-    iso_bb(&PX[12], n->nlink, 4);
-    iso_bb(&PX[20], px_get_uid(t, n), 4);
-    iso_bb(&PX[28], px_get_gid(t, n), 4);
+    iso_bb(&PX[4], (uint32_t) px_get_mode(t, n), 4);
+    iso_bb(&PX[12], (uint32_t) n->nlink, 4);
+    iso_bb(&PX[20], (uint32_t) px_get_uid(t, n), 4);
+    iso_bb(&PX[28], (uint32_t) px_get_gid(t, n), 4);
     if (t->rrip_1_10_px_ino || !t->rrip_version_1_10) {
-        iso_bb(&PX[36], n->ino, 4);
+        iso_bb(&PX[36], (uint32_t) n->ino, 4);
     }
 
     return susp_append(t, susp, PX);
@@ -243,10 +243,10 @@ int rrip_add_PN(Ecma119Image *t, Ecma119Node *n, struct susp_info *susp)
     */
     if (sizeof(node->dev) > 4) {
         high_shift = 32;
-        iso_bb(&PN[4], node->dev >> high_shift, 4);
+        iso_bb(&PN[4], (uint32_t) (node->dev >> high_shift), 4);
     } else
         iso_bb(&PN[4], 0, 4);
-    iso_bb(&PN[12], node->dev & 0xffffffff, 4);
+    iso_bb(&PN[12], (uint32_t) (node->dev & 0xffffffff), 4);
     return susp_append(t, susp, PN);
 }
 
@@ -695,7 +695,7 @@ int susp_add_CE(Ecma119Image *t, size_t ce_len, struct susp_info *susp)
     CE[3] = 1;
     iso_bb(&CE[4], susp->ce_block, 4);
     iso_bb(&CE[12], susp->ce_len, 4);
-    iso_bb(&CE[20], ce_len, 4);
+    iso_bb(&CE[20], (uint32_t) ce_len, 4);
 
     return susp_append(t, susp, CE);
 }