diff --git a/.github/workflows/macos_install.sh b/.github/workflows/macos_install.sh
index 4f340c73f9e..08cf05cd82c 100755
--- a/.github/workflows/macos_install.sh
+++ b/.github/workflows/macos_install.sh
@@ -44,6 +44,7 @@ CONFIGURE_FLAGS="\
   --with-proj-includes=${CONDA_PREFIX}/include \
   --with-proj-libs=${CONDA_PREFIX}/lib \
   --with-proj-share=${CONDA_PREFIX}/share/proj \
+  --with-pthread \
   --with-readline \
   --with-readline-includes=${CONDA_PREFIX}/include/readline \
   --with-readline-libs=${CONDA_PREFIX}/lib
diff --git a/macos/files/configure-grass.sh b/macos/files/configure-grass.sh
index 99d883b58aa..e3f3e14b7aa 100755
--- a/macos/files/configure-grass.sh
+++ b/macos/files/configure-grass.sh
@@ -68,6 +68,7 @@ CONFIGURE_FLAGS="\
   --with-libs=${PREFIX}/lib \
   --with-includes=${PREFIX}/include \
   --with-pdal=${PREFIX}/bin/pdal-config \
+  --with-pthread \
   --with-readline \
   --with-readline-includes=${PREFIX}/include/readline \
   --with-readline-libs=${PREFIX}/lib