diff --git a/libclamav/ole2_extract.c b/libclamav/ole2_extract.c
index e47781b614..b79e2a0747 100644
--- a/libclamav/ole2_extract.c
+++ b/libclamav/ole2_extract.c
@@ -782,16 +782,16 @@ static void test_for_encryption(const property_t *word_block, ole2_header_t *hdr
     }
 }
 
-static bool read_uint16(const uint8_t *const ptr, uint32_t ptr_size, uint32_t *idx, uint16_t *dst)
+static size_t read_uint16(const uint8_t *const ptr, uint32_t ptr_size, uint32_t *idx, uint16_t *dst)
 {
     if (*idx + sizeof(uint16_t) >= ptr_size) {
-        return false;
+        return 0;
     }
 
     memcpy(dst, &(ptr[*idx]), 2);
     *dst = ole2_endian_convert_16(*dst);
     *idx += sizeof(uint16_t);
-    return true;
+    return sizeof(uint16_t);
 }
 
 /* Search for the FILE_PASS number.  If I don't find it, the next two bytes are
@@ -806,11 +806,11 @@ static bool find_file_pass(const uint8_t *const ptr, uint32_t ptr_size, uint32_t
     const uint32_t FILE_PASS_NUM = 47;
 
     while (true) {
-        if (!read_uint16(ptr, ptr_size, idx, &val)) {
+        if (sizeof(uint16_t) != read_uint16(ptr, ptr_size, idx, &val)) {
             return false;
         }
 
-        if (!read_uint16(ptr, ptr_size, idx, &size)) {
+        if (sizeof(uint16_t) != read_uint16(ptr, ptr_size, idx, &size)) {
             return false;
         }
 
@@ -845,7 +845,7 @@ static void test_for_xls_encryption(const property_t *word_block, ole2_header_t
 
     /*Validate keyword*/
     idx = 0;
-    if (!read_uint16(ptr, block_size, &idx, &tmp16)) {
+    if (sizeof(uint16_t) != read_uint16(ptr, block_size, &idx, &tmp16)) {
         return;
     }
 
@@ -856,7 +856,7 @@ static void test_for_xls_encryption(const property_t *word_block, ole2_header_t
 
     /*Skip past this size.*/
     memcpy(&tmp16, &(ptr[idx]), 2);
-    if (!read_uint16(ptr, block_size, &idx, &tmp16)) {
+    if (sizeof(uint16_t) != read_uint16(ptr, block_size, &idx, &tmp16)) {
         return;
     }
     idx += tmp16;
@@ -865,7 +865,7 @@ static void test_for_xls_encryption(const property_t *word_block, ole2_header_t
         return;
     }
 
-    if (!read_uint16(ptr, block_size, &idx, &tmp16)) {
+    if (sizeof(uint16_t) != read_uint16(ptr, block_size, &idx, &tmp16)) {
         return;
     }