diff --git a/include/hermit/stdlib.h b/include/hermit/stdlib.h
index e79ede32a..4eadb7e99 100644
--- a/include/hermit/stdlib.h
+++ b/include/hermit/stdlib.h
@@ -121,17 +121,17 @@ void page_free(void* addr, size_t sz);
  *
  * @return Long value of the parsed numerical string
  */
-long __strtol(const char* str, char** endptr, int base);
+long _strtol(const char* str, char** endptr, int base);
 
-#define strtol(str, endptr, base)	__strtol((str), (endptr), (base))
+#define strtol(str, endptr, base)	_strtol((str), (endptr), (base))
 
 /** @brief String to unsigned long
  *
  * @return Unsigned long value of the parsed numerical string
  */
-unsigned long __strtoul(const char* nptr, char** endptr, int base);
+unsigned long _strtoul(const char* nptr, char** endptr, int base);
 
-#define strtoul(nptr, endptr, base)	__strtoul((nptr), (endptr), (base))
+#define strtoul(nptr, endptr, base)	_strtoul((nptr), (endptr), (base))
 
 /** @brief ASCII to integer
  *
@@ -141,7 +141,7 @@ unsigned long __strtoul(const char* nptr, char** endptr, int base);
  */
 static inline int atoi(const char *str)
 {
-	return (int)strtol(str, (char **)NULL, 10);
+	return (int)_strtol(str, (char **)NULL, 10);
 }
 
 #ifdef __cplusplus
diff --git a/include/hermit/string.h b/include/hermit/string.h
index cc3410d92..2624f6d98 100644
--- a/include/hermit/string.h
+++ b/include/hermit/string.h
@@ -42,56 +42,56 @@ extern "C" {
 #endif
 
 #if !HAVE_ARCH_MEMCPY
-void *__memcpy(void *dest, const void *src, size_t count);
+void *_memcpy(void *dest, const void *src, size_t count);
 
-#define memcpy(dest, src, count) __memcpy((dest), (src), (count))
+#define memcpy(dest, src, count) _memcpy((dest), (src), (count))
 #endif
 
 #if !HAVE_ARCH_MEMSET
-void *__memset(void *dest, int val, size_t count);
+void *_memset(void *dest, int val, size_t count);
 
-#define memset(dest, val, count) __memset((dest), (val), (count))
+#define memset(dest, val, count) _memset((dest), (val), (count))
 #endif
 
 #if !HAVE_ARCH_MEMCMP
-int __memcmp(const void *s1, const void *s2, size_t n);
+int _memcmp(const void *s1, const void *s2, size_t n);
 
-#define memcmp(s1, s2, n) __memcmp((s1), (s2), (n))
+#define memcmp(s1, s2, n) _memcmp((s1), (s2), (n))
 #endif
 
 #if !HAVE_ARCH_STRLEN
-size_t __strlen(const char *str);
+size_t _strlen(const char *str);
 
-#define strlen(str) __strlen((str))
+#define strlen(str) _strlen((str))
 #endif
 
 #if !HAVE_ARCH_STRNCPY
-char *__strncpy(char *dest, const char *src, size_t n);
+char *_strncpy(char *dest, const char *src, size_t n);
 
-#define strncpy(dest, src, n) __strncpy((dest), (src), (n))
+#define strncpy(dest, src, n) _strncpy((dest), (src), (n))
 #endif
 
 #if !HAVE_ARCH_STRCPY
-char *__strcpy(char *dest, const char *src);
+char *_strcpy(char *dest, const char *src);
 
-#define strcpy(dest, src) __strcpy((dest), (src))
+#define strcpy(dest, src) _strcpy((dest), (src))
 #endif
 
 #if !HAVE_ARCH_STRCMP
-int __strcmp(const char *s1, const char *s2);
+int _strcmp(const char *s1, const char *s2);
 
-#define strcmp(s1, s2) __strcmp((s1), (s2))
+#define strcmp(s1, s2) _strcmp((s1), (s2))
 #endif
 
 #if !HAVE_ARCH_STRNCMP
-int __strncmp(const char *s1, const char *s2, size_t n);
+int _strncmp(const char *s1, const char *s2, size_t n);
 
-#define strncmp(s1, s2, n) __strncmp((s1), (s2), (n))
+#define strncmp(s1, s2, n) _strncmp((s1), (s2), (n))
 #endif
 
-char *__strstr(const char *s, const char *find);
+char *_strstr(const char *s, const char *find);
 
-#define strstr(s, find) __strstr((s), (find))
+#define strstr(s, find) _strstr((s), (find))
 
 #ifdef __cplusplus
 }
diff --git a/libkern/string.c b/libkern/string.c
index 83130da83..31ba69b8b 100644
--- a/libkern/string.c
+++ b/libkern/string.c
@@ -11,7 +11,7 @@
 #include <hermit/string.h>
 
 #if !HAVE_ARCH_MEMCPY
-void *__memcpy(void *dest, const void *src, size_t count)
+void *_memcpy(void *dest, const void *src, size_t count)
 {
 	size_t i;
 
@@ -26,7 +26,7 @@ void *__memcpy(void *dest, const void *src, size_t count)
 #endif
 
 #if !HAVE_ARCH_MEMSET
-void *__memset(void *dest, int val, size_t count)
+void *_memset(void *dest, int val, size_t count)
 {
 	size_t i;
 
@@ -41,7 +41,7 @@ void *__memset(void *dest, int val, size_t count)
 #endif
 
 #if !HAVE_ARCH_MEMCMP
-int __memcmp(const void *s1, const void *s2, size_t n)
+int _memcmp(const void *s1, const void *s2, size_t n)
 {
 	if (n != 0) {
 		const unsigned char *p1 = s1, *p2 = s2;
@@ -57,7 +57,7 @@ int __memcmp(const void *s1, const void *s2, size_t n)
 #endif
 
 #if !HAVE_ARCH_STRLEN
-size_t __strlen(const char *str)
+size_t _strlen(const char *str)
 {
 	size_t len = 0;
 
@@ -72,7 +72,7 @@ size_t __strlen(const char *str)
 #endif
 
 #if !HAVE_ARCH_STRNCPY
-char* __strncpy(char *dest, const char *src, size_t n)
+char* _strncpy(char *dest, const char *src, size_t n)
 {
 	size_t i;
 
@@ -91,7 +91,7 @@ char* __strncpy(char *dest, const char *src, size_t n)
 #endif
 
 #if !HAVE_ARCH_STRCPY
-char* __strcpy(char *dest, const char *src)
+char* _strcpy(char *dest, const char *src)
 {
         size_t i;
 
@@ -107,7 +107,7 @@ char* __strcpy(char *dest, const char *src)
 #endif
 
 #if !HAVE_ARCH_STRCMP
-int __strcmp(const char *s1, const char *s2)
+int _strcmp(const char *s1, const char *s2)
 {
 	while (*s1 != '\0' && *s1 == *s2) {
 		s1++;
@@ -119,7 +119,7 @@ int __strcmp(const char *s1, const char *s2)
 #endif
 
 #if !HAVE_ARCH_STRNCMP
-int __strncmp(const char *s1, const char *s2, size_t n)
+int _strncmp(const char *s1, const char *s2, size_t n)
 {
 	if (BUILTIN_EXPECT(n == 0, 0))
 		return 0;
diff --git a/libkern/strstr.c b/libkern/strstr.c
index 5ca08146f..ae0898ebc 100644
--- a/libkern/strstr.c
+++ b/libkern/strstr.c
@@ -48,7 +48,7 @@
  * Find the first occurrence of find in s.
  */
 char *
-__strstr(s, find)
+_strstr(s, find)
 	const char *s, *find;
 {
 	char c, sc;
diff --git a/libkern/strtol.c b/libkern/strtol.c
index 94f098c05..7c1998831 100644
--- a/libkern/strtol.c
+++ b/libkern/strtol.c
@@ -50,7 +50,7 @@
  * alphabets and digits are each contiguous.
  */
 long
-__strtol(nptr, endptr, base)
+_strtol(nptr, endptr, base)
 	const char *nptr;
 	char **endptr;
 	int base;
diff --git a/libkern/strtoul.c b/libkern/strtoul.c
index a2029a335..a934927e5 100644
--- a/libkern/strtoul.c
+++ b/libkern/strtoul.c
@@ -50,7 +50,7 @@
  * alphabets and digits are each contiguous.
  */
 unsigned long
-__strtoul(nptr, endptr, base)
+_strtoul(nptr, endptr, base)
 	const char *nptr;
 	char **endptr;
 	int base;