diff --git a/include/jemalloc/internal/bitmap_types.h b/include/jemalloc/internal/bitmap_types.h
index ec8a6dc9..d0de2f05 100644
--- a/include/jemalloc/internal/bitmap_types.h
+++ b/include/jemalloc/internal/bitmap_types.h
@@ -65,14 +65,19 @@ typedef unsigned long bitmap_t;
 #ifdef BITMAP_USE_TREE
 
 #if LG_BITMAP_MAXBITS <= LG_BITMAP_GROUP_NBITS
+#  define BITMAP_GROUPS(nbits)	BITMAP_GROUPS_1_LEVEL(nbits)
 #  define BITMAP_GROUPS_MAX	BITMAP_GROUPS_1_LEVEL(BITMAP_MAXBITS)
 #elif LG_BITMAP_MAXBITS <= LG_BITMAP_GROUP_NBITS * 2
+#  define BITMAP_GROUPS(nbits)	BITMAP_GROUPS_2_LEVEL(nbits)
 #  define BITMAP_GROUPS_MAX	BITMAP_GROUPS_2_LEVEL(BITMAP_MAXBITS)
 #elif LG_BITMAP_MAXBITS <= LG_BITMAP_GROUP_NBITS * 3
+#  define BITMAP_GROUPS(nbits)	BITMAP_GROUPS_3_LEVEL(nbits)
 #  define BITMAP_GROUPS_MAX	BITMAP_GROUPS_3_LEVEL(BITMAP_MAXBITS)
 #elif LG_BITMAP_MAXBITS <= LG_BITMAP_GROUP_NBITS * 4
+#  define BITMAP_GROUPS(nbits)	BITMAP_GROUPS_4_LEVEL(nbits)
 #  define BITMAP_GROUPS_MAX	BITMAP_GROUPS_4_LEVEL(BITMAP_MAXBITS)
 #elif LG_BITMAP_MAXBITS <= LG_BITMAP_GROUP_NBITS * 5
+#  define BITMAP_GROUPS(nbits)	BITMAP_GROUPS_5_LEVEL(nbits)
 #  define BITMAP_GROUPS_MAX	BITMAP_GROUPS_5_LEVEL(BITMAP_MAXBITS)
 #else
 #  error "Unsupported bitmap size"
@@ -119,6 +124,7 @@ typedef unsigned long bitmap_t;
 
 #else /* BITMAP_USE_TREE */
 
+#define BITMAP_GROUPS(nbits)	BITMAP_BITS2GROUPS(nbits)
 #define BITMAP_GROUPS_MAX	BITMAP_BITS2GROUPS(BITMAP_MAXBITS)
 
 #define BITMAP_INFO_INITIALIZER(nbits) {				\