diff --git a/libftasm/includes/libft.h b/libftasm/includes/libft.h
index bbebfb96..e4338d1d 100644
--- a/libftasm/includes/libft.h
+++ b/libftasm/includes/libft.h
@@ -104,6 +104,8 @@ char	**ft_split_whitespaces(char *str);
 char	*ft_convert_base(
 		char *str, char *base_from, char *base_to, char *flags);
 char	*ft_strcatf(char *s1, const char *s2);
+char	*ft_strinsert(char *str, char c, int n);
+void	ft_strsqueeze(char *str, int n);
 
 char	*ft_itoa_base(int nbr, char *base, char *flags);
 char	*ft_lltoa_base(long long nbr, char *base, char *flags);
diff --git a/libftasm/src/dlst/ft_dlstadd_after.c b/libftasm/src/dlst/ft_dlstadd_after.c
index caec607d..19dc852a 100644
--- a/libftasm/src/dlst/ft_dlstadd_after.c
+++ b/libftasm/src/dlst/ft_dlstadd_after.c
@@ -19,6 +19,8 @@ void	ft_dlstadd_after(t_dlist **alst, t_dlist *new)
 		new->prev = (*alst);
 		if (*alst)
 			new->next = (*alst)->next;
+		else
+			new->next = NULL;
 		if (new->next)
 			new->next->prev = new;
 		if (new->prev)
diff --git a/libftasm/src/str/ft_strinsert.c b/libftasm/src/str/ft_strinsert.c
new file mode 100644
index 00000000..685d0834
--- /dev/null
+++ b/libftasm/src/str/ft_strinsert.c
@@ -0,0 +1,12 @@
+#include "libft.h"
+
+char	*ft_strinsert(char *str, char c, int n)
+{
+	char	tmp[ft_strlen(str)];
+	char	*out;
+
+	ft_strcpy(tmp, str + n);
+	str[n] = 0;
+	out = ft_str3join(str, (char []){c, 0}, tmp);
+	return (out);
+}
diff --git a/libftasm/src/str/ft_strsqueeze.c b/libftasm/src/str/ft_strsqueeze.c
new file mode 100644
index 00000000..f94d800c
--- /dev/null
+++ b/libftasm/src/str/ft_strsqueeze.c
@@ -0,0 +1,11 @@
+#include "libft.h"
+
+void	ft_strsqueeze(char *str, int n)
+{
+	int		i;
+
+	i = 0;
+	while (str[i] && i < n)
+		i++;
+	ft_strcpy(str, str + 1);
+}