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--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -32,7 +32,6 @@
     $(X_CFLAGS) \
     -DRECOLL_DATADIR=\"${pkgdatadir}\" \
     -D_GNU_SOURCE \
-    -DTESTING_XAPIAN_SPELL \
     $(DEFS)
 
 ACLOCAL_AMFLAGS = -I m4