diff --git a/src/asahi/compiler/agx_compiler.h b/src/asahi/compiler/agx_compiler.h
index c348e73a70a..d83b032b69b 100644
--- a/src/asahi/compiler/agx_compiler.h
+++ b/src/asahi/compiler/agx_compiler.h
@@ -28,6 +28,9 @@ extern "C" {
 /* Semi-arbitrary limit for spill slot allocation */
 #define AGX_NUM_MODELED_REGS (2048)
 
+/* Limit on number of sources for non-phi instructions */
+#define AGX_MAX_NORMAL_SOURCES (16)
+
 enum agx_index_type {
    AGX_INDEX_NULL = 0,
    AGX_INDEX_NORMAL = 1,