diff --git a/Implementing-ipatix's-High-Quality-Audio-Mixer.md b/Implementing-ipatix's-High-Quality-Audio-Mixer.md
index 8dc35cc..4d710ca 100644
--- a/Implementing-ipatix's-High-Quality-Audio-Mixer.md
+++ b/Implementing-ipatix's-High-Quality-Audio-Mixer.md
@@ -108,9 +108,12 @@ We can fix this very easily by using the `STMIA` instruction for DMA register wr
 -    dmaRegs[1] = (vu32)(dest);                    \
 -    dmaRegs[2] = (vu32)(control);                 \
 -    dmaRegs[2];                                   \
-+    register u32 r_src asm("r0") = (u32)src;      \
-+    register u32 r_dst asm("r1") = (u32)dest;     \
-+    register u32 r_ctl asm("r2") = (u32)control;  \
++    u32 eval_src = (u32)(src);                    \
++    u32 eval_dst = (u32)(dest);                   \
++    u32 eval_ctl = (u32)(control);                \
++    register u32 r_src asm("r0") = eval_src;      \
++    register u32 r_dst asm("r1") = eval_dst;      \
++    register u32 r_ctl asm("r2") = eval_ctl;      \
 +    asm volatile("stmia %0!, {%1, %2, %3}" : "+l" (dmaRegs) : "l" (r_src), "l" (r_dst), "l" (r_ctl) : "memory");  \
  }
 ```