diff --git a/data/Makefile.am b/data/Makefile.am
index ef9bb87..e5c62c6 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -17,13 +17,13 @@ install:
 		echo ""; \
 		exit 1; \
 	fi;
-	@if test ! -d @PACKAGE_DATA_DIR@; then \
-		mkdir @PACKAGE_DATA_DIR@; \
+	@if test ! -d ${prefix}/@NO_PREFIX_PACKAGE_DATA_DIR@; then \
+		mkdir ${prefix}/@NO_PREFIX_PACKAGE_DATA_DIR@; \
 	fi;
-	cp player @PACKAGE_DATA_DIR@ -rf
-	cp maps @PACKAGE_DATA_DIR@ -rf
-	cp gfx @PACKAGE_DATA_DIR@ -rf
-	cp tileset @PACKAGE_DATA_DIR@ -rf
+	cp player ${prefix}/@NO_PREFIX_PACKAGE_DATA_DIR@ -rf
+	cp maps ${prefix}/@NO_PREFIX_PACKAGE_DATA_DIR@ -rf
+	cp gfx ${prefix}/@NO_PREFIX_PACKAGE_DATA_DIR@ -rf
+	cp tileset ${prefix}/@NO_PREFIX_PACKAGE_DATA_DIR@ -rf
 
 uninstall:
-	rm -rf @PACKAGE_DATA_DIR@
+	rm -rf ${prefix}/@NO_PREFIX_PACKAGE_DATA_DIR@