diff --git a/bubulles.c b/bubulles.c
index 29cb3bc..f11ac5e 100644
--- a/bubulles.c
+++ b/bubulles.c
@@ -84,7 +84,7 @@ fprintf(stderr, ">>> %s ( %p %d )\n", __func__, bbl, k);
 
 if (NULL == bbl->bbs) {
 	fprintf(stderr, "%s : array ptr is null\n", __func__);
-#ifdef MUST_ABORT
+#if MUST_ABORT
 	abort();
 #endif
 	return 1;
@@ -108,7 +108,7 @@ fprintf(stderr, ">>> %s ( %p %d )\n", __func__, where, idx);
 if ( (idx < 0) || (idx > where->fidx) ) {
 	fprintf(stderr, "%s : idx %d out of range on %p\n",
 				__func__, idx, where);
-#ifdef MUST_ABORT
+#if MUST_ABORT
 	abort();
 #endif
 	return NULL;
@@ -186,7 +186,7 @@ int	peek_bubulle(BBList *from, Bubulle *to, int idx)
 
 if (NULL==from) {
 	fprintf(stderr, "in %s, *from is null\n", __func__);
-#ifdef MUST_ABORT
+#if MUST_ABORT
 	abort();
 #endif
 	return -5;
@@ -216,7 +216,7 @@ Bubulle		*ar;
 
 if (NULL == bbl) {
 	fprintf(stderr, "in %s, *bbl is NULL\n", __func__);
-#ifdef MUST_ABORT
+#if MUST_ABORT
 	abort();
 #endif
 	return -5;
@@ -261,7 +261,7 @@ int		idx;
 
 if (NULL == what) {
 	fprintf(stderr, "SHIT HAPPEN IN %s\n", __func__);
-#ifdef MUST_ABORT
+#if MUST_ABORT
 	abort();
 #endif
 	return -5;
@@ -337,7 +337,7 @@ int print_bbox(BBox *bbox, int k)
 
 if (NULL==bbox) {
 	fprintf(stderr, "in %s, *bbox is NULL\n", __func__);
-#ifdef MUST_ABORT
+#if MUST_ABORT
 	abort();
 #endif
 	return -5;