diff --git a/internal/rosa/zlib.go b/internal/rosa/zlib.go
index 7ec605ba..ab1ae7ea 100644
--- a/internal/rosa/zlib.go
+++ b/internal/rosa/zlib.go
@@ -15,6 +15,7 @@ func (t Toolchain) newZlib() (pkg.Artifact, string) {
 		Cache: []KV{
 			{"CMAKE_BUILD_TYPE", "Release"},
 
+			{"CMAKE_C_FLAGS", "-fPIC"},
 			{"ZLIB_BUILD_TESTING", "OFF"},
 			{"ZLIB_BUILD_SHARED", "ON"},
 			{"ZLIB_BUILD_STATIC", "ON"},