diff --git a/tests/libtest/Makefile.am b/tests/libtest/Makefile.am
index ce700bd58..c5aefd475 100644
--- a/tests/libtest/Makefile.am
+++ b/tests/libtest/Makefile.am
@@ -164,7 +164,7 @@ lib556_SOURCES = lib556.c $(SUPPORTFILES)
 lib557_SOURCES = lib557.c $(SUPPORTFILES)
 
 lib558_SOURCES = lib558.c $(SUPPORTFILES)
-lib526_CFLAGS = -DLIB558
+lib558_CFLAGS = -DLIB558
 
 lib559_SOURCES = lib558.c $(SUPPORTFILES)
-lib526_CFLAGS = -DLIB559
+lib559_CFLAGS = -DLIB559