diff --git a/unix/tkUnixButton.c b/unix/tkUnixButton.c
index 65c8042c5..8ed985e6c 100644
--- a/unix/tkUnixButton.c
+++ b/unix/tkUnixButton.c
@@ -293,16 +293,15 @@ TkpDrawCheckIndicator(
 	}
 	memcpy(svgDataCopy, svgDataPtr, svgDataLen);
 	svgDataCopy[svgDataLen] = '\0';
-	svgDataPtr = svgDataCopy;
 
 	/*
 	 * Update the colors within svgDataCopy
 	 */
 
-	darkColorPtr =      strstr(svgDataPtr, "DARKKK");
-	lightColorPtr =     strstr(svgDataPtr, "LIGHTT");
-	interiorColorPtr =  strstr(svgDataPtr, "INTROR");
-	indicatorColorPtr = strstr(svgDataPtr, "INDCTR");
+	darkColorPtr =      strstr(svgDataCopy, "DARKKK");
+	lightColorPtr =     strstr(svgDataCopy, "LIGHTT");
+	interiorColorPtr =  strstr(svgDataCopy, "INTROR");
+	indicatorColorPtr = strstr(svgDataCopy, "INDCTR");
 
 	if (darkColorPtr != NULL) {
 	    memcpy(darkColorPtr, darkColorStr, 6);
diff --git a/win/tkWinButton.c b/win/tkWinButton.c
index 9734f59bc..43d536818 100644
--- a/win/tkWinButton.c
+++ b/win/tkWinButton.c
@@ -455,18 +455,17 @@ TkpDrawIndicator(
 	}
 	memcpy(svgDataCopy, svgDataPtr, svgDataLen);
 	svgDataCopy[svgDataLen] = '\0';
-	svgDataPtr = svgDataCopy;
 
 	/*
 	 * Update the colors within svgDataCopy
 	 */
 
-	topOuterColorPtr = strstr(svgDataPtr, "a0a0a0");
-	btmOuterColorPtr = strstr(svgDataPtr, "eeeeee");
-	topInnerColorPtr = strstr(svgDataPtr, "696969");
-	btmInnerColorPtr = strstr(svgDataPtr, "e3e3e3");
-	interiorColorPtr = strstr(svgDataPtr, "ffffff");
-	checkColorPtr =    strstr(svgDataPtr, "000000");
+	topOuterColorPtr = strstr(svgDataCopy, "a0a0a0");
+	btmOuterColorPtr = strstr(svgDataCopy, "eeeeee");
+	topInnerColorPtr = strstr(svgDataCopy, "696969");
+	btmInnerColorPtr = strstr(svgDataCopy, "e3e3e3");
+	interiorColorPtr = strstr(svgDataCopy, "ffffff");
+	checkColorPtr =    strstr(svgDataCopy, "000000");
 
 	assert(topOuterColorPtr);
 	assert(btmOuterColorPtr);