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-rw-r--r--Makefile.grf.in4
1 files changed, 2 insertions, 2 deletions
diff --git a/Makefile.grf.in b/Makefile.grf.in
index 196c11f0f..a70b3072b 100644
--- a/Makefile.grf.in
+++ b/Makefile.grf.in
@@ -42,8 +42,8 @@ NFORENUM := $(shell [ `nforenum -s -v 2>/dev/null | wc -l ` -eq 1 ] && echo "nfo
MD5SUM := $(shell [ "$(OS)" = "OSX" ] && echo "md5 -r" || echo "md5sum")
# Some "should not be changed" settings.
-NFO_FILES := $(GRF_DIR)/*.nfo
-PNG_FILES := $(GRF_DIR)/*.png
+NFO_FILES := $(GRF_DIR)/*.nfo $(GRF_DIR)/rivers/*.nfo
+PNG_FILES := $(GRF_DIR)/*.png $(GRF_DIR)/rivers/*.png
# Build the GRF.
all: $(BIN_DIR)/openttd.grf