diff --git a/libs/vkd3d-shader/dxbc.c b/libs/vkd3d-shader/dxbc.c
index 13566c38..40bf3a72 100644
--- a/libs/vkd3d-shader/dxbc.c
+++ b/libs/vkd3d-shader/dxbc.c
@@ -21,6 +21,10 @@
 #include "vkd3d_shader_private.h"
 #include "sm4.h"
 
+#define SM4_MAX_SRC_COUNT 6
+
+STATIC_ASSERT(SM4_MAX_SRC_COUNT <= SPIRV_MAX_SRC_COUNT);
+
 void dxbc_writer_init(struct dxbc_writer *dxbc)
 {
     memset(dxbc, 0, sizeof(*dxbc));
@@ -91,7 +95,7 @@ struct vkd3d_shader_sm4_parser
 
     unsigned int output_map[MAX_REG_OUTPUT];
 
-    struct vkd3d_shader_src_param src_param[VKD3D_DXBC_MAX_SOURCE_COUNT];
+    struct vkd3d_shader_src_param src_param[SM4_MAX_SRC_COUNT];
     struct vkd3d_shader_dst_param dst_param[2];
     struct list src_free;
     struct list src;
diff --git a/libs/vkd3d-shader/spirv.c b/libs/vkd3d-shader/spirv.c
index ff8c020a..734ba315 100644
--- a/libs/vkd3d-shader/spirv.c
+++ b/libs/vkd3d-shader/spirv.c
@@ -6938,7 +6938,7 @@ static void spirv_compiler_emit_alu_instruction(struct spirv_compiler *compiler,
     struct vkd3d_spirv_builder *builder = &compiler->spirv_builder;
     const struct vkd3d_shader_dst_param *dst = instruction->dst;
     const struct vkd3d_shader_src_param *src = instruction->src;
-    uint32_t src_ids[VKD3D_DXBC_MAX_SOURCE_COUNT];
+    uint32_t src_ids[SPIRV_MAX_SRC_COUNT];
     uint32_t type_id, val_id;
     unsigned int i;
     SpvOp op;
@@ -6951,7 +6951,7 @@ static void spirv_compiler_emit_alu_instruction(struct spirv_compiler *compiler,
     }
 
     assert(instruction->dst_count == 1);
-    assert(instruction->src_count <= VKD3D_DXBC_MAX_SOURCE_COUNT);
+    assert(instruction->src_count <= SPIRV_MAX_SRC_COUNT);
 
     type_id = spirv_compiler_get_type_id_for_dst(compiler, dst);
 
@@ -7031,7 +7031,7 @@ static void spirv_compiler_emit_ext_glsl_instruction(struct spirv_compiler *comp
     struct vkd3d_spirv_builder *builder = &compiler->spirv_builder;
     const struct vkd3d_shader_dst_param *dst = instruction->dst;
     const struct vkd3d_shader_src_param *src = instruction->src;
-    uint32_t src_id[VKD3D_DXBC_MAX_SOURCE_COUNT];
+    uint32_t src_id[SPIRV_MAX_SRC_COUNT];
     uint32_t instr_set_id, type_id, val_id;
     enum GLSLstd450 glsl_inst;
     unsigned int i;
@@ -7046,7 +7046,7 @@ static void spirv_compiler_emit_ext_glsl_instruction(struct spirv_compiler *comp
     instr_set_id = vkd3d_spirv_get_glsl_std450_instr_set(builder);
 
     assert(instruction->dst_count == 1);
-    assert(instruction->src_count <= VKD3D_DXBC_MAX_SOURCE_COUNT);
+    assert(instruction->src_count <= SPIRV_MAX_SRC_COUNT);
 
     type_id = spirv_compiler_get_type_id_for_dst(compiler, dst);
 
diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h
index 0c83edf1..a750b55e 100644
--- a/libs/vkd3d-shader/vkd3d_shader_private.h
+++ b/libs/vkd3d-shader/vkd3d_shader_private.h
@@ -1085,6 +1085,8 @@ int vkd3d_glsl_generator_generate(struct vkd3d_glsl_generator *generator,
         struct vkd3d_shader_parser *parser, struct vkd3d_shader_code *out);
 void vkd3d_glsl_generator_destroy(struct vkd3d_glsl_generator *generator);
 
+#define SPIRV_MAX_SRC_COUNT 6
+
 struct spirv_compiler;
 
 struct spirv_compiler *spirv_compiler_create(const struct vkd3d_shader_version *shader_version,
@@ -1237,7 +1239,6 @@ static inline void *vkd3d_find_struct_(const struct vkd3d_struct *chain,
     return NULL;
 }
 
-#define VKD3D_DXBC_MAX_SOURCE_COUNT 6
 #define VKD3D_DXBC_HEADER_SIZE (8 * sizeof(uint32_t))
 
 #define TAG_AON9 VKD3D_MAKE_TAG('A', 'o', 'n', '9')