diff --git a/Makefile b/Makefile
index 54d332c..ef3ee4b 100644
--- a/Makefile
+++ b/Makefile
@@ -248,7 +248,6 @@
 # Additional warnings
 # Level 1
 WARNING1 := -Wextra
-WARNING1 += -Wmissing-declarations
 WARNING1 += -Wmissing-format-attribute
 WARNING1 += -Wmissing-prototypes
 WARNING1 += -Wold-style-definition