diff --git a/projects/postgis/build.sh b/projects/postgis/build.sh
index b2101374e..8ab0f7f49 100755
--- a/projects/postgis/build.sh
+++ b/projects/postgis/build.sh
@@ -22,5 +22,8 @@ make clean -s
 make -j$(nproc) -s
 cd ..
 
+chmod +x ./fuzzers/build_google_oss_fuzzers.sh
 ./fuzzers/build_google_oss_fuzzers.sh
+
+chmod +x ./fuzzers/build_seed_corpus.sh
 ./fuzzers/build_seed_corpus.sh