diff --git a/src/pptx/oxml/shapes/connector.py b/src/pptx/oxml/shapes/connector.py
index 91261f780..3cd19f111 100644
--- a/src/pptx/oxml/shapes/connector.py
+++ b/src/pptx/oxml/shapes/connector.py
@@ -58,8 +58,8 @@ def new_cxnSp(
                 f"  </p:nvCxnSpPr>\n"
                 f"  <p:spPr>\n"
                 f"    <a:xfrm{flip}>\n"
-                f'      <a:off x="{x}" y="{y}"/>\n'
-                f'      <a:ext cx="{cx}" cy="{cy}"/>\n'
+                f'      <a:off x="{int(x)}" y="{int(y)}"/>\n'
+                f'      <a:ext cx="{int(cx)}" cy="{int(cy)}"/>\n'
                 f"    </a:xfrm>\n"
                 f'    <a:prstGeom prst="{prst}">\n'
                 f"      <a:avLst/>\n"
diff --git a/tests/shapes/test_shapetree.py b/tests/shapes/test_shapetree.py
index 3cf1ab225..e3e107e29 100644
--- a/tests/shapes/test_shapetree.py
+++ b/tests/shapes/test_shapetree.py
@@ -523,6 +523,14 @@ def add_cht_gr_frm_fixture(self):
                 3,
                 "p:spPr/(a:xfrm{flipH=1,flipV=1}/(a:off{x=2,y=3},a:ext{cx=7,cy=5})",
             ),
+            # float EMUs (e.g. shape.height / 2) must become integer XML attrs
+            (
+                1.5,
+                2.5,
+                3.7,
+                5.2,
+                "p:spPr/(a:xfrm/(a:off{x=1,y=2},a:ext{cx=2,cy=2})",
+            ),
         ]
     )
     def add_cxnSp_fixture(self, request):