diff --git a/apps/plugins/lua/README b/apps/plugins/lua/README
index 06cfd6f8f8..a56b500091 100644
--- a/apps/plugins/lua/README
+++ b/apps/plugins/lua/README
@@ -3,7 +3,4 @@ version 0.31 which is licensed under the GPL version 2:
 
     gmtime.c
     strftime.c
-    strpbrk.c
-    strtol.c
-    strtoul.c
     strstr.c
diff --git a/apps/plugins/lua/SOURCES b/apps/plugins/lua/SOURCES
index 481bf7672f..a188915a38 100644
--- a/apps/plugins/lua/SOURCES
+++ b/apps/plugins/lua/SOURCES
@@ -33,8 +33,6 @@ rocklib_img.c
 tlsf_helper.c
 strftime.c
 strpbrk.c
-strtoul.c
-strtol.c
 strstr.c
 rocklua.c
 luadir.c
diff --git a/apps/plugins/lua/rockconf.h b/apps/plugins/lua/rockconf.h
index 503c2c7dec..9ff42e1d6c 100644
--- a/apps/plugins/lua/rockconf.h
+++ b/apps/plugins/lua/rockconf.h
@@ -43,8 +43,6 @@
 
 extern char curpath[MAX_PATH];
 struct tm *gmtime(const time_t *timep);
-long strtol(const char *nptr, char **endptr, int base);
-unsigned long strtoul(const char *str, char **endptr, int base);
 size_t strftime(char* dst, size_t max, const char* format, const struct tm* tm);
 long lfloor(long x);
 long lpow(long x, long y);
@@ -64,6 +62,8 @@ int splash_scroller(int timeout, const char* str);
 #define strcmp   rb->strcmp
 #define strcpy   rb->strcpy
 #define strlen   rb->strlen
+#define strtol   rb->strtol
+#define strtoul  rb->strtoul
 #define yield()  rb->yield()
 
 #endif /* _ROCKCONF_H_ */
diff --git a/apps/plugins/lua/strtol.c b/apps/plugins/lua/strtol.c
deleted file mode 100644
index 564494643d..0000000000
--- a/apps/plugins/lua/strtol.c
+++ /dev/null
@@ -1,27 +0,0 @@
-#include "rocklibc.h"
-
-extern unsigned long int strtoul(const char *ptr, char **endptr, int base);
-
-#define ABS_LONG_MIN LONG_MAX
-long int strtol(const char *nptr, char **endptr, int base)
-{
-  int neg=0;
-  unsigned long int v;
-  const char*orig=nptr;
-
-  while(__unlikely(isspace(*nptr))) nptr++;
-
-  if (*nptr == '-' && isalnum(nptr[1])) { neg=-1; ++nptr; }
-  v=strtoul(nptr,endptr,base);
-  if (endptr && *endptr==nptr) *endptr=(char *)orig;
-  if (__unlikely(v>=ABS_LONG_MIN)) {
-    if (v==ABS_LONG_MIN && neg) {
-      errno=0;
-      return v;
-    }
-    errno=ERANGE;
-    return (neg?LONG_MIN:LONG_MAX);
-  }
-  return (neg?-v:v);
-}
-
diff --git a/apps/plugins/lua/strtoul.c b/apps/plugins/lua/strtoul.c
deleted file mode 100644
index 834721f05b..0000000000
--- a/apps/plugins/lua/strtoul.c
+++ /dev/null
@@ -1,53 +0,0 @@
-#include "rocklibc.h"
-
-unsigned long int strtoul(const char *ptr, char **endptr, int base)
-{
-  int neg = 0, overflow = 0;
-  unsigned long int v=0;
-  const char* orig;
-  const char* nptr=ptr;
-
-  while(__unlikely(isspace(*nptr))) ++nptr;
-
-  if (*nptr == '-') { neg=1; nptr++; }
-  else if (*nptr == '+') ++nptr;
-  orig=nptr;
-  if (base==16 && nptr[0]=='0') goto skip0x;
-  if (base) {
-    register unsigned int b=base-2;
-    if (__unlikely(b>34)) { errno=EINVAL; return 0; }
-  } else {
-    if (*nptr=='0') {
-      base=8;
-skip0x:
-      if ((nptr[1]=='x'||nptr[1]=='X') && isxdigit(nptr[2])) {
-	nptr+=2;
-	base=16;
-      }
-    } else
-      base=10;
-  }
-  while(__likely(*nptr)) {
-    register unsigned char c=*nptr;
-    c=(c>='a'?c-'a'+10:c>='A'?c-'A'+10:c<='9'?c-'0':0xff);
-    if (__unlikely(c>=base)) break;	/* out of base */
-    {
-      register unsigned long x=(v&0xff)*base+c;
-      register unsigned long w=(v>>8)*base+(x>>8);
-      if (w>(ULONG_MAX>>8)) overflow=1;
-      v=(w<<8)+(x&0xff);
-    }
-    ++nptr;
-  }
-  if (__unlikely(nptr==orig)) {		/* no conversion done */
-    nptr=ptr;
-    errno=EINVAL;
-    v=0;
-  }
-  if (endptr) *endptr=(char *)nptr;
-  if (overflow) {
-    errno=ERANGE;
-    return ULONG_MAX;
-  }
-  return (neg?-v:v);
-}
diff --git a/firmware/libc/strtol.c b/firmware/libc/strtol.c
index a38acac025..71186755da 100644
--- a/firmware/libc/strtol.c
+++ b/firmware/libc/strtol.c
@@ -1,3 +1,6 @@
+/* The following file is (with slight modifications for Rockbox) from dietlibc
+* version 0.31 which is licensed under the GPL version 2: */
+
 #include <stdlib.h>
 #include <errno.h>
 #include <limits.h>
diff --git a/firmware/libc/strtoul.c b/firmware/libc/strtoul.c
index 34a8ae47c2..2cbd80796a 100644
--- a/firmware/libc/strtoul.c
+++ b/firmware/libc/strtoul.c
@@ -1,3 +1,6 @@
+/* The following file is (with slight modifications for Rockbox) from dietlibc
+* version 0.31 which is licensed under the GPL version 2: */
+
 #include <stdlib.h>
 #include <errno.h>
 #include <ctype.h>