diff --git a/dist-build/android-build.sh b/dist-build/android-build.sh
index e8d65b23..2937370f 100755
--- a/dist-build/android-build.sh
+++ b/dist-build/android-build.sh
@@ -62,7 +62,7 @@ fi
   --with-sysroot="${TOOLCHAIN_DIR}/sysroot" || exit 1
 
 if [ "$NDK_PLATFORM" != "$NDK_PLATFORM_COMPAT" ]; then
-  egrep '^#define ' config.log | sort -u >config-def-compat.log
+  grep -E '^#define ' config.log | sort -u >config-def-compat.log
   echo
   echo "Configuring again for platform [${NDK_PLATFORM}]"
   echo
diff --git a/test/constcheck.sh b/test/constcheck.sh
index 994c1642..46010ae9 100755
--- a/test/constcheck.sh
+++ b/test/constcheck.sh
@@ -5,7 +5,7 @@ CT='ct.c'
 echo '#include <assert.h>' > "$CT"
 echo '#include <sodium.h>' >> "$CT"
 echo 'int main(void) {' >> "$CT"
-for macro in $(egrep -r '#define crypto_.*BYTES(_[A-Z]+)? ' src/libsodium/include | \
+for macro in $(grep -Er '#define crypto_.*BYTES(_[A-Z]+)? ' src/libsodium/include | \
                cut -d: -f2- | cut -d' ' -f2 | \
                fgrep -v edwards25519sha512batch | sort -u); do
   func=$(echo "$macro" | tr A-Z a-z)