diff --git a/crates/pptx/src/custgeom.rs b/crates/pptx/src/custgeom.rs
index ae122144..81553026 100644
--- a/crates/pptx/src/custgeom.rs
+++ b/crates/pptx/src/custgeom.rs
@@ -331,13 +331,15 @@ pub fn parse_path(d: &str) -> Vec<(char, Vec<f64>)> {
     };
     for ch in d.chars() {
         match ch {
+            // An 'E' inside a number is an exponent, not the end command.
+            'E' if !token.is_empty() => token.push(ch),
             'M' | 'L' | 'C' | 'Q' | 'Z' | 'm' | 'l' | 'c' | 'q' | 'z' | 'E' => {
                 push_tok(&mut token, &mut nums);
                 flush(cmd, &mut nums, &mut out);
                 cmd = Some(ch.to_ascii_uppercase());
             }
             ' ' | ',' | '\t' | '\n' => push_tok(&mut token, &mut nums),
-            '-' if !token.is_empty() && !token.ends_with('e') => {
+            '-' if !token.is_empty() && !token.ends_with(['e', 'E']) => {
                 push_tok(&mut token, &mut nums);
                 token.push(ch);
             }
@@ -472,6 +474,13 @@ mod tests {
         assert_eq!(back[0].d, "M 0 0 L 100000 0 C 100000 10000 90000 50000 50000 50000 Q 0 50000 0 0 Z");
     }
 
+    #[test]
+    fn parse_path_uppercase_exponent() {
+        assert_eq!(parse_path("M 1E-5 2 L 3 4"), vec![('M', vec![1e-5, 2.0]), ('L', vec![3.0, 4.0])]);
+        assert_eq!(parse_path("M 1.5E3 2"), vec![('M', vec![1500.0, 2.0])]);
+        assert_eq!(parse_path("M 1e-5 2"), vec![('M', vec![1e-5, 2.0])]);
+    }
+
     #[test]
     fn parse_path_tokens() {
         let v = parse_path("M0,0 L10-5 Z");