diff --git a/kernel/src/utils/string.c b/kernel/src/utils/string.c
index 5ad49b0..34fe63a 100644
--- a/kernel/src/utils/string.c
+++ b/kernel/src/utils/string.c
@@ -50,10 +50,15 @@ uint64_t variadic_format_size(string_t string, va_list args) {
             buffer_in++;
             if (*buffer_in == '.') {
                 buffer_in++;
-                while (*buffer_in > '0' && *buffer_in < '9') {
-                    numeric_specifier *= 10;
-                    numeric_specifier += *buffer_in - '0';
+                if (*buffer_in == '*') {
                     buffer_in++;
+                    numeric_specifier = va_arg(args, uint64_t);
+                } else {
+                    while (*buffer_in > '0' && *buffer_in < '9') {
+                        numeric_specifier *= 10;
+                        numeric_specifier += *buffer_in - '0';
+                        buffer_in++;
+                    }
                 }
             }
 
@@ -67,8 +72,6 @@ uint64_t variadic_format_size(string_t string, va_list args) {
                     uint64_t strlen = string_length(va_arg(args, string_t));
                     if (numeric_specifier > 0) {
                         strlen = MIN(strlen, numeric_specifier);
-                    } else {
-                        strlen = numeric_specifier;
                     }
 
                     length += strlen;
@@ -176,10 +179,15 @@ void variadic_format(string_t output, string_t string, va_list args) {
             buffer_in++;
             if (*buffer_in == '.') {
                 buffer_in++;
-                while (*buffer_in > '0' && *buffer_in < '9') {
-                    numeric_specifier *= 10;
-                    numeric_specifier += *buffer_in - '0';
+                if (*buffer_in == '*') {
                     buffer_in++;
+                    numeric_specifier = va_arg(args, uint64_t);
+                } else {
+                    while (*buffer_in > '0' && *buffer_in < '9') {
+                        numeric_specifier *= 10;
+                        numeric_specifier += *buffer_in - '0';
+                        buffer_in++;
+                    }
                 }
             }
 
@@ -196,8 +204,6 @@ void variadic_format(string_t output, string_t string, va_list args) {
 
                     if (numeric_specifier > 0) {
                         strlen = MIN(strlen, numeric_specifier);
-                    } else {
-                        strlen = numeric_specifier;
                     }
 
                     memory_copy((void*)str, buffer_out, strlen);