diff --git a/libpixelflinger/tests/arch-arm64/assembler/arm64_assembler_test.cpp b/libpixelflinger/tests/arch-arm64/assembler/arm64_assembler_test.cpp
index 456be58a0..fd96f7ebc 100644
--- a/libpixelflinger/tests/arch-arm64/assembler/arm64_assembler_test.cpp
+++ b/libpixelflinger/tests/arch-arm64/assembler/arm64_assembler_test.cpp
@@ -409,7 +409,7 @@ void flushcache()
 {
     const long base = long(instrMem);
     const long curr = base + long(instrMemSize);
-    __builtin___clear_cache((void*)base, (void*)curr);
+    __builtin___clear_cache((char*)base, (char*)curr);
 }
 void dataOpTest(dataOpTest_t test, ARMAssemblerInterface *a64asm, uint32_t Rd = 0,
                 uint32_t Rn = 1, uint32_t Rm = 2, uint32_t Rs = 3)