diff --git a/c-programming/asprintf.c b/c-programming/asprintf.c
index 4dbdda5..cdb6363 100644
--- a/c-programming/asprintf.c
+++ b/c-programming/asprintf.c
@@ -11,19 +11,20 @@ ssize_t asprintf(char** strp, char* format, ...) {
 	va_list args;
 	va_start(args, format);
 
-	ssize_t size = (ssize_t) vsnprintf(NULL, 0, format, args);
-	if (size < 0) {
+	ssize_t result = (ssize_t) vsnprintf(NULL, 0, format, args);
+	if (result < 0) {
 		va_end(args);
 		return -1;
 	}
 
-	*strp = malloc(++size);
+	size_t size = (size_t) result + 1;
+	*strp = malloc(size * sizeof(char));
 	if (*strp == NULL) {
 		va_end(args);
 		return -1;
 	}
 
-	ssize_t result = (ssize_t) vsnprintf(*strp, size, format, args);
+	result = (ssize_t) vsnprintf(*strp, size, format, args);
 	va_end(args);
 
 	if (result < 0) {