Index: uspace/lib/posix/stdbool.h
===================================================================
--- uspace/lib/posix/stdbool.h	(revision 422af2b1e7236addac60aba765ad4a3d606b1365)
+++ uspace/lib/posix/stdbool.h	(revision a47f52276416c12f15162cebefb4e81101e86a92)
@@ -37,10 +37,12 @@
 
 #ifdef LIBC_BOOL_H_
-#if (!defined(POSIX_STDIO_H_)) \
-		&& (!defined(POSIX_STDLIB_H_)) \
-		&& (!defined(POSIX_STRING_H_))
-#error "You can't include bool.h and stdbool.h at the same time."
+
+#if (!defined(POSIX_STDIO_H_)) && \
+    (!defined(POSIX_STDLIB_H_)) && \
+    (!defined(POSIX_STRING_H_))
+	#error "You can't include bool.h and stdbool.h at the same time."
 #endif
-#endif
+
+#endif /* LIBC_BOOL_H */
 
 #define LIBC_BOOL_H_