diff --git a/src/ui.c b/src/ui.c
index b85f86e..2037d32 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -266,11 +266,16 @@ void ExportPNG(const SpectrogramApp* spa, const char* dirPath)
     int imgW = spa->spectrogramImage.width;
     int imgH = spa->spectrogramImage.height;
 
-    // Selection region in image-pixel coordinates
+    // Selection region in image-pixel coordinates. The image spans the full
+    // Nyquist axis, but sel.freq* are fractions of the *displayed* axis (capped
+    // at EffectiveMaxFreqHz), so scale by DisplayFreqFraction() the same way the
+    // on-screen texture sub-sampling does — otherwise the export grabs a band
+    // higher in frequency than what was box-selected.
+    float cropFrac = DisplayFreqFraction();
     int selX0 = (int)(spa->sel.timeStart * imgW);
     int selX1 = (int)(spa->sel.timeEnd   * imgW);
-    int selY0 = (int)((1.0f - spa->sel.freqEnd) * imgH);
-    int selY1 = (int)((1.0f - spa->sel.freqStart) * imgH);
+    int selY0 = (int)((1.0f - spa->sel.freqEnd   * cropFrac) * imgH);
+    int selY1 = (int)((1.0f - spa->sel.freqStart * cropFrac) * imgH);
 
     // Clamp to image bounds
     selX0 = Clamp(selX0, 0, imgW);