diff --git a/pkgs/by-name/s7/s7/package.nix b/pkgs/by-name/s7/s7/package.nix
index 022c0ce15ab1..19b5ca52d849 100644
--- a/pkgs/by-name/s7/s7/package.nix
+++ b/pkgs/by-name/s7/s7/package.nix
@@ -72,6 +72,7 @@ stdenv.mkDerivation (finalAttrs: {
 
     cc notcurses_s7.c -o libnotcurses_s7.so \
         -O2 -I. \
+        -Wno-error=implicit-function-declaration \
         -shared \
         -lnotcurses-core \
         -fPIC