diff --git a/lib/fort.c b/lib/fort.c
index 402e93b..57d09f7 100644
--- a/lib/fort.c
+++ b/lib/fort.c
@@ -3151,7 +3151,7 @@ clear:
 
 const char *ft_to_string(const ft_table_t *table)
 {
-    return ft_to_string_impl(table, CHAR_BUF);
+    return (const char *)ft_to_string_impl(table, CHAR_BUF);
 }
 
 #ifdef FT_HAVE_WCHAR
@@ -3627,9 +3627,9 @@ FT_INTERNAL
 size_t number_of_columns_in_format_u8string(const void *fmt)
 {
     size_t separator_counter = 0;
-    const char *pos = fmt;
+    const char *pos = (const char *)fmt;
     while (1) {
-        pos = utf8chr(pos, g_col_separator);
+        pos = (const char *)utf8chr(pos, g_col_separator);
         if (pos == NULL)
             break;
 
@@ -3789,8 +3789,8 @@ int ft_nwprint(conv_context_t *cntx, const wchar_t *str, size_t strlen)
 FT_INTERNAL
 int ft_nu8print(conv_context_t *cntx, const void *beg, const void *end)
 {
-    const char *bc = beg;
-    const char *ec = end;
+    const char *bc = (const char *)beg;
+    const char *ec = (const char *)end;
     size_t raw_len = ec - bc;
     if (cntx->raw_avail + 1 < raw_len)
         return -1;
@@ -6024,16 +6024,16 @@ void wstr_n_substring(const wchar_t *str, wchar_t ch_separator, size_t n, const
 FT_INTERNAL
 void utf8_n_substring(const void *str, utf8_int32_t ch_separator, size_t n, const void **begin, const void **end)
 {
-    const char *beg = utf8_n_substring_beg(str, ch_separator, n);
+    const char *beg = (const char *)utf8_n_substring_beg(str, ch_separator, n);
     if (beg == NULL) {
         *begin = NULL;
         *end = NULL;
         return;
     }
 
-    const char *en = utf8chr(beg, ch_separator);
+    const char *en = (const char *)utf8chr(beg, ch_separator);
     if (en == NULL) {
-        en = (const char *)str + strlen(str);
+        en = (const char *)str + strlen((const char *)str);
     }
 
     *begin = beg;
@@ -6219,7 +6219,7 @@ FT_INTERNAL
 size_t ut8_width(const void *beg, const void *end)
 {
     size_t sz = (size_t)((const char *)end - (const char *)beg);
-    char *tmp = F_MALLOC(sizeof(char) * (sz + 1));
+    char *tmp = (char *)F_MALLOC(sizeof(char) * (sz + 1));
     // @todo: add check to tmp
     assert(tmp);
 
diff --git a/src/fort_impl.c b/src/fort_impl.c
index e5fcd23..0b19bd0 100644
--- a/src/fort_impl.c
+++ b/src/fort_impl.c
@@ -697,7 +697,7 @@ clear:
 
 const char *ft_to_string(const ft_table_t *table)
 {
-    return ft_to_string_impl(table, CHAR_BUF);
+    return (const char *)ft_to_string_impl(table, CHAR_BUF);
 }
 
 #ifdef FT_HAVE_WCHAR
diff --git a/src/fort_utils.c b/src/fort_utils.c
index 0158c04..66c23b7 100644
--- a/src/fort_utils.c
+++ b/src/fort_utils.c
@@ -179,9 +179,9 @@ FT_INTERNAL
 size_t number_of_columns_in_format_u8string(const void *fmt)
 {
     size_t separator_counter = 0;
-    const char *pos = fmt;
+    const char *pos = (const char *)fmt;
     while (1) {
-        pos = utf8chr(pos, g_col_separator);
+        pos = (const char *)utf8chr(pos, g_col_separator);
         if (pos == NULL)
             break;
 
@@ -341,8 +341,8 @@ int ft_nwprint(conv_context_t *cntx, const wchar_t *str, size_t strlen)
 FT_INTERNAL
 int ft_nu8print(conv_context_t *cntx, const void *beg, const void *end)
 {
-    const char *bc = beg;
-    const char *ec = end;
+    const char *bc = (const char *)beg;
+    const char *ec = (const char *)end;
     size_t raw_len = ec - bc;
     if (cntx->raw_avail + 1 < raw_len)
         return -1;
diff --git a/src/string_buffer.c b/src/string_buffer.c
index 87ae61b..d63c54b 100644
--- a/src/string_buffer.c
+++ b/src/string_buffer.c
@@ -226,16 +226,16 @@ void wstr_n_substring(const wchar_t *str, wchar_t ch_separator, size_t n, const
 FT_INTERNAL
 void utf8_n_substring(const void *str, utf8_int32_t ch_separator, size_t n, const void **begin, const void **end)
 {
-    const char *beg = utf8_n_substring_beg(str, ch_separator, n);
+    const char *beg = (const char *)utf8_n_substring_beg(str, ch_separator, n);
     if (beg == NULL) {
         *begin = NULL;
         *end = NULL;
         return;
     }
 
-    const char *en = utf8chr(beg, ch_separator);
+    const char *en = (const char *)utf8chr(beg, ch_separator);
     if (en == NULL) {
-        en = (const char *)str + strlen(str);
+        en = (const char *)str + strlen((const char *)str);
     }
 
     *begin = beg;
@@ -421,7 +421,7 @@ FT_INTERNAL
 size_t ut8_width(const void *beg, const void *end)
 {
     size_t sz = (size_t)((const char *)end - (const char *)beg);
-    char *tmp = F_MALLOC(sizeof(char) * (sz + 1));
+    char *tmp = (char *)F_MALLOC(sizeof(char) * (sz + 1));
     // @todo: add check to tmp
     assert(tmp);