diff --git a/embeddings.cpp b/embeddings.cpp
index 5388d957..99428eee 100644
--- a/embeddings.cpp
+++ b/embeddings.cpp
@@ -543,7 +543,7 @@ struct emb_same_in_same : emb_actual {
     for(int i=0; i<4; i++) T[i][2] = T[i][3], T[i][3] = 0;
     for(int i=0; i<4; i++) T[2][i] = T[3][i], T[3][i] = 0;
     T[3][3] = 1;
-    fixmatrix(T);
+    if(MDIM == 3) fixmatrix(T); else IPF(fixmatrix(T));
     for(int i=0; i<MDIM; i++) for(int j=0; j<MDIM; j++) if(isnan(T[i][j])) return Id;
     return T;
     }