diff --git a/CMakeLists.txt b/CMakeLists.txt
index a9be55d6c69b..3e87964e5b17 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ cmake_policy(SET CMP0048 NEW)
 
 
 ##############################################################################
-set(VORPALINE_VERSION_RC TRUE)
+set(VORPALINE_VERSION_RC FALSE)
 set(VORPALINE_VERSION_MAJOR 1)
 set(VORPALINE_VERSION_MINOR 9)
 set(VORPALINE_VERSION_PATCH 2)
diff --git a/src/lib/geogram/delaunay/periodic_delaunay_3d.cpp b/src/lib/geogram/delaunay/periodic_delaunay_3d.cpp
index 20d2fb5ac325..c8cca412c8e0 100644
--- a/src/lib/geogram/delaunay/periodic_delaunay_3d.cpp
+++ b/src/lib/geogram/delaunay/periodic_delaunay_3d.cpp
@@ -209,7 +209,6 @@ namespace {
         );
     }
 
-
     /************************************************************************/
 
     void delaunay_citations() {
@@ -251,6 +250,26 @@ namespace {
     }
 }
 
+/************************************************************************/
+
+// These two functions are missing when compiling in PSM mode.
+#ifdef GEOGRAM_PSM
+    namespace GEO {
+	namespace PCK {
+	    inline Sign det_3d(const vec3& p0, const vec3& p1, const vec3& p2) {
+		return det_3d(p0.data(), p1.data(), p2.data());
+	    }
+	    inline Sign det_4d(
+		const vec4& p0, const vec4& p1,	const vec4& p2, const vec4& p3
+	    ) {
+		return det_4d(p0.data(), p1.data(), p2.data(), p3.data());
+	    }
+	}
+    }
+#endif
+
+/************************************************************************/
+
 namespace GEO {
 
     /**