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-rw-r--r--research/draw_diff.cc2
-rw-r--r--research/read_dist.h2
2 files changed, 2 insertions, 2 deletions
diff --git a/research/draw_diff.cc b/research/draw_diff.cc
index 6541dac..1a52869 100644
--- a/research/draw_diff.cc
+++ b/research/draw_diff.cc
@@ -16,7 +16,7 @@
#include <cstdlib> /* exit, EXIT_FAILURE */
#include <vector>
-#ifndef CHECK
+#if !defined(CHECK)
#define CHECK(X) if (!(X)) exit(EXIT_FAILURE);
#endif
diff --git a/research/read_dist.h b/research/read_dist.h
index 3cac473..63d3b97 100644
--- a/research/read_dist.h
+++ b/research/read_dist.h
@@ -19,7 +19,7 @@
#include <cstdio>
#include <cstdlib> /* exit, EXIT_FAILURE */
-#ifndef CHECK
+#if !defined(CHECK)
#define CHECK(X) if (!(X)) exit(EXIT_FAILURE);
#endif