diff --git a/src/file_utils.c b/src/file_utils.c
index f25e5ee6..5fc2dfbe 100644
--- a/src/file_utils.c
+++ b/src/file_utils.c
@@ -198,7 +198,7 @@ bool file_write_float(FILE *file, float value) {
 }
 
 inline uint32_t file_deserialize_uint32(unsigned char *buf) {
-    return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
+    return ((uint32_t)buf[0] << 24) | ((uint32_t)buf[1] << 16) | ((uint32_t)buf[2] << 8) | (uint32_t)buf[3];
 }
 
 bool file_read_uint32(FILE *file, uint32_t *value) {
@@ -243,7 +243,7 @@ bool file_write_uint32(FILE *file, uint32_t value) {
 
 
 inline uint16_t file_deserialize_uint16(unsigned char *buf) {
-    return (buf[0] << 8) | buf[1];
+    return ((uint16_t)buf[0] << 8) | buf[1];
 }