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-rw-r--r--constants.asm4
1 files changed, 4 insertions, 0 deletions
diff --git a/constants.asm b/constants.asm
index 7864ec9d0..758b3abcc 100644
--- a/constants.asm
+++ b/constants.asm
@@ -1,3 +1,7 @@
+if __RGBDS_MAJOR__ <= 0 && __RGBDS_MINOR__ < 4
+ fail "pokecrystal requires rgbds 0.4.0 or newer."
+endc
+
INCLUDE "charmap.asm"
INCLUDE "macros.asm"