diff --git a/include/bsd/stdlib.h b/include/bsd/stdlib.h
index 2bee974..f7bcbd0 100644
--- a/include/bsd/stdlib.h
+++ b/include/bsd/stdlib.h
@@ -72,7 +72,8 @@ int sradixsort(const unsigned char **base, int nmemb,
 
 void *reallocf(void *ptr, size_t size);
 #if !defined(__GLIBC__) || \
-    (defined(__GLIBC__) && (!__GLIBC_PREREQ(2, 26) || !defined(_GNU_SOURCE)))
+    !__GLIBC_PREREQ(2, 26) || \
+    !defined(_GNU_SOURCE)
 void *reallocarray(void *ptr, size_t nmemb, size_t size);
 #endif
 void *recallocarray(void *ptr, size_t oldnmemb, size_t nmemb, size_t size);
diff --git a/include/bsd/string.h b/include/bsd/string.h
index f987fee..d03c755 100644
--- a/include/bsd/string.h
+++ b/include/bsd/string.h
@@ -47,7 +47,8 @@ char *strnstr(const char *str, const char *find, size_t str_len);
 void strmode(mode_t mode, char *str);
 
 #if !defined(__GLIBC__) || \
-    (defined(__GLIBC__) && (!__GLIBC_PREREQ(2, 25) || !defined(_GNU_SOURCE)))
+    !__GLIBC_PREREQ(2, 25) || \
+    !defined(_GNU_SOURCE)
 void explicit_bzero(void *buf, size_t len);
 #endif
 __END_DECLS