diff --git a/build.sh b/build.sh
index 4fceb6e3..0b664807 100755
--- a/build.sh
+++ b/build.sh
@@ -53,7 +53,7 @@ case "${ostype}" in
             # Apple M1 (may be new version of homebrew also)
             if [ -d /opt/homebrew ]  
             then
-                build_flags="${build_flags} -D CMAKE_C_FLAGS=-I/usr/homebrew/include -D CMAKE_EXE_LINKER_FLAGS=-L/usr/homebrew/Cellar"
+                build_flags="${build_flags} -D CMAKE_C_FLAGS=-I/opt/homebrew/include -D CMAKE_EXE_LINKER_FLAGS=-L/opt/homebrew/Cellar"
             else
                 build_flags="${build_flags} -D CMAKE_C_FLAGS=-I/usr/local/include -D CMAKE_EXE_LINKER_FLAGS=-L/usr/local/Cellar"
             fi