diff --git a/libs/libc/libc.csv b/libs/libc/libc.csv
index a5395ed6fa..a1e246d3f7 100644
--- a/libs/libc/libc.csv
+++ b/libs/libc/libc.csv
@@ -100,12 +100,12 @@
 "memcpy","string.h","","FAR void *","FAR void *","FAR const void *","size_t"
 "memmove","string.h","","FAR void *","FAR void *","FAR const void *","size_t"
 "memset","string.h","","FAR void *","FAR void *","int","size_t"
-"mkfifo","sys/stat.h","","int","FAR const char *","mode_t"
+"mkfifo","sys/stat.h","defined(CONFIG_PIPES) && CONFIG_DEV_FIFO_SIZE > 0","int","FAR const char *","mode_t"
 "mktime","time.h","","time_t","FAR struct tm *"
 "ntohl","arpa/inet.h","","uint32_t","uint32_t"
 "ntohs","arpa/inet.h","","uint16_t","uint16_t"
 "perror","stdio.h","defined(CONFIG_FILE_STREAM)","void","FAR const char *"
-"pipe","unistd.h","","int","int [2]|FAR int *"
+"pipe","unistd.h","defined(CONFIG_PIPES) && CONFIG_DEV_PIPE_SIZE > 0","int","int [2]|FAR int *"
 "printf","stdio.h","","int","FAR const IPTR char *","..."
 "pthread_attr_destroy","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR pthread_attr_t *"
 "pthread_attr_getinheritsched","pthread.h","!defined(CONFIG_DISABLE_PTHREAD)","int","FAR const pthread_attr_t *","FAR int *"