diff --git a/CMakeLists.txt b/CMakeLists.txt
index bf94e53..62c2e8b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,8 +68,6 @@ set(SOURCES_COMMON
   src/std/aprint.c
   src/std/malloc.c
   src/std/print.c
-  src/std/string.c
-  src/std/string-ext.c
   src/tmu/inth-etmu.s
   src/tmu/inth-tmu.s
   src/tmu/sleep.c
diff --git a/include/gint/defs/util.h b/include/gint/defs/util.h
index 8182ece..f129a0f 100644
--- a/include/gint/defs/util.h
+++ b/include/gint/defs/util.h
@@ -34,12 +34,6 @@
 	0;				\
 })
 
-/* abs() (without double evaluation) */
-#define abs(s) ({			\
-	GAUTOTYPE _s = (s);		\
-	_s < 0 ? -s : s;		\
-})
-
 /* swap() - exchange two variables of the same type */
 #define	swap(a, b) ({			\
 	GAUTOTYPE _tmp = (a);		\
diff --git a/src/render/dline.c b/src/render/dline.c
index 6e37afb..098fd76 100644
--- a/src/render/dline.c
+++ b/src/render/dline.c
@@ -41,7 +41,7 @@ void dline(int x1, int y1, int x2, int y2, int color)
 	int dx = x2 - x1, dy = y2 - y1;
 	int sx = sgn(dx), sy = sgn(dy);
 
-	dx = abs(dx), dy = abs(dy);
+	dx = (dx >= 0 ? dx : -dx), dy = (dy >= 0 ? dy : -dy);
 
 	dpixel(x1, y1, color);
 
diff --git a/src/std/string-ext.c b/src/std/string-ext.c
deleted file mode 100644
index f6de513..0000000
--- a/src/std/string-ext.c
+++ /dev/null
@@ -1,12 +0,0 @@
-//---
-//	gint:std:string-ext: Extensions to the standard for <string.h>
-//---
-
-#include <gint/defs/attributes.h>
-#include <gint/std/string.h>
-
-GWEAK char *strchrnul(char const *s, int c)
-{
-	while(*s && *s != c) s++;
-	return (char *)s;
-}
diff --git a/src/std/string.c b/src/std/string.c
deleted file mode 100644
index 1fbf5b1..0000000
--- a/src/std/string.c
+++ /dev/null
@@ -1,53 +0,0 @@
-//---
-//	gint:core:string - replicas of a few string functions
-//---
-
-#include <gint/defs/types.h>
-#include <gint/defs/attributes.h>
-#include <gint/std/string.h>
-#include <stdarg.h>
-
-GWEAK size_t strlen(char const *str)
-{
-	int len = 0;
-	while(str[len]) len++;
-	return len;
-}
-
-GWEAK char *strncpy(char *dst, char const *src, size_t n)
-{
-	size_t i = 0;
-	while(i < n && (dst[i] = src[i])) i++;
-	return dst;
-}
-
-GWEAK char *strcat(char *dest, char const *src)
-{
-	unsigned long fin_dest = strlen(dest);
-	unsigned int i;
-	for (i = 0 ; i <= strlen(src) ; i++) dest[fin_dest + i] = src[i];
-	return dest;
-}
-
-GWEAK int strcmp(char const *s1, char const *s2)
-{
-	while(*s1 && *s1 == *s2) s1++, s2++;
-	return *s1 - *s2;
-}
-
-GWEAK char *strchr(char const *s, int c)
-{
-	while(*s && *s != c) s++;
-	return (*s) ? (char *)s : NULL;
-}
-
-GWEAK char *strrchr(char const *s, int c)
-{
-	char const *found = NULL;
-	while(*s)
-	{
-		if(*s == c) found = s;
-		s++;
-	}
-	return (char *)found;
-}