diff --git a/mongoose.h b/mongoose.h
index fbe26f23..c0262b12 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -63,12 +63,6 @@ extern "C" {
 #endif
 #endif  // !defined(MG_ARCH)
 
-#if defined(__GNUC__) && defined(__arm__)
-#define PRINTF_LIKE(f, a) __attribute__((format(printf, f, a)))
-#else
-#define PRINTF_LIKE(f, a)
-#endif
-
 #if MG_ARCH == MG_ARCH_CUSTOM
 #include <mongoose_custom.h>
 #endif
@@ -722,11 +716,11 @@ bool mg_globmatch(const char *pattern, size_t plen, const char *s, size_t n);
 bool mg_commalist(struct mg_str *s, struct mg_str *k, struct mg_str *v);
 bool mg_split(struct mg_str *s, struct mg_str *k, struct mg_str *v, char delim);
 size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list ap);
-size_t mg_snprintf(char *, size_t, const char *fmt, ...) PRINTF_LIKE(3, 4);
+size_t mg_snprintf(char *, size_t, const char *fmt, ...);
 char *mg_hex(const void *buf, size_t len, char *dst);
 void mg_unhex(const char *buf, size_t len, unsigned char *to);
 unsigned long mg_unhexn(const char *s, size_t len);
-size_t mg_asprintf(char **, size_t, const char *fmt, ...) PRINTF_LIKE(3, 4);
+size_t mg_asprintf(char **, size_t, const char *fmt, ...);
 size_t mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap);
 int mg_check_ip_acl(struct mg_str acl, uint32_t remote_ip);
 int64_t mg_to64(struct mg_str str);
@@ -738,7 +732,7 @@ size_t mg_lld(char *buf, int64_t val, bool is_signed, bool is_hex);
 
 
 enum { MG_LL_NONE, MG_LL_ERROR, MG_LL_INFO, MG_LL_DEBUG, MG_LL_VERBOSE };
-void mg_log(const char *fmt, ...) PRINTF_LIKE(1, 2);
+void mg_log(const char *fmt, ...);
 bool mg_log_prefix(int ll, const char *file, int line, const char *fname);
 void mg_log_set(const char *spec);
 void mg_hexdump(const void *buf, size_t len);
diff --git a/src/arch.h b/src/arch.h
index 9a7b1d10..4508c8f5 100644
--- a/src/arch.h
+++ b/src/arch.h
@@ -36,12 +36,6 @@
 #endif
 #endif  // !defined(MG_ARCH)
 
-#if defined(__GNUC__) && defined(__arm__)
-#define PRINTF_LIKE(f, a) __attribute__((format(printf, f, a)))
-#else
-#define PRINTF_LIKE(f, a)
-#endif
-
 #if MG_ARCH == MG_ARCH_CUSTOM
 #include <mongoose_custom.h>
 #endif
diff --git a/src/log.h b/src/log.h
index f4d663fb..20510147 100644
--- a/src/log.h
+++ b/src/log.h
@@ -4,7 +4,7 @@
 #include "config.h"
 
 enum { MG_LL_NONE, MG_LL_ERROR, MG_LL_INFO, MG_LL_DEBUG, MG_LL_VERBOSE };
-void mg_log(const char *fmt, ...) PRINTF_LIKE(1, 2);
+void mg_log(const char *fmt, ...);
 bool mg_log_prefix(int ll, const char *file, int line, const char *fname);
 void mg_log_set(const char *spec);
 void mg_hexdump(const void *buf, size_t len);
diff --git a/src/str.h b/src/str.h
index 93808a57..bdf7633c 100644
--- a/src/str.h
+++ b/src/str.h
@@ -32,11 +32,11 @@ bool mg_globmatch(const char *pattern, size_t plen, const char *s, size_t n);
 bool mg_commalist(struct mg_str *s, struct mg_str *k, struct mg_str *v);
 bool mg_split(struct mg_str *s, struct mg_str *k, struct mg_str *v, char delim);
 size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list ap);
-size_t mg_snprintf(char *, size_t, const char *fmt, ...) PRINTF_LIKE(3, 4);
+size_t mg_snprintf(char *, size_t, const char *fmt, ...);
 char *mg_hex(const void *buf, size_t len, char *dst);
 void mg_unhex(const char *buf, size_t len, unsigned char *to);
 unsigned long mg_unhexn(const char *s, size_t len);
-size_t mg_asprintf(char **, size_t, const char *fmt, ...) PRINTF_LIKE(3, 4);
+size_t mg_asprintf(char **, size_t, const char *fmt, ...);
 size_t mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap);
 int mg_check_ip_acl(struct mg_str acl, uint32_t remote_ip);
 int64_t mg_to64(struct mg_str str);
diff --git a/test/unit_test.c b/test/unit_test.c
index d770f357..f3b2dbbf 100644
--- a/test/unit_test.c
+++ b/test/unit_test.c
@@ -1366,19 +1366,6 @@ static bool sn(const char *fmt, ...) {
   return result;
 }
 
-static bool sn2(const char *expect, const char *fmt, ...) {
-  char buf[100];
-  va_list ap;
-  bool result;
-  va_start(ap, fmt);
-  mg_vsnprintf(buf, sizeof(buf), fmt, ap);
-  va_end(ap);
-  va_start(ap, fmt);
-  result = strcmp(expect, buf) == 0;
-  if (!result) MG_ERROR(("[%s] != [%s]", expect, buf));
-  return result;
-}
-
 static bool sccmp(const char *s1, const char *s2, int expected) {
   int n1 = mg_casecmp(s1, s2);
   // MG_INFO(("[%s] [%s] %d %d", s1, s2, n1, expected));