diff --git a/icu4c/source/layout/DeviceTables.cpp b/icu4c/source/layout/DeviceTables.cpp
index 34a08688da0..1882ede5a7e 100644
--- a/icu4c/source/layout/DeviceTables.cpp
+++ b/icu4c/source/layout/DeviceTables.cpp
@@ -1,7 +1,7 @@
 /*
  * @(#)DeviceTables.cpp 1.5 00/03/15
  *
- * (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved
+ * (C) Copyright IBM Corp. 1998 - 2004 - All Rights Reserved
  *
  */
 
@@ -36,7 +36,7 @@ le_int16 DeviceTable::getAdjustment(le_uint16 ppem) const
         result = field;
 
         if ((field & fieldSignBits[format]) != 0) {
-            result |= ! fieldMasks[format];
+            result |= ~ fieldMasks[format];
         }
     }
 
diff --git a/icu4c/source/layout/PairPositioningSubtables.cpp b/icu4c/source/layout/PairPositioningSubtables.cpp
index 575d1eaa4a9..7b31ac8618c 100644
--- a/icu4c/source/layout/PairPositioningSubtables.cpp
+++ b/icu4c/source/layout/PairPositioningSubtables.cpp
@@ -52,12 +52,16 @@ le_uint32 PairPositioningFormat1Subtable::process(GlyphIterator *glyphIterator,
     if (coverageIndex >= 0 && glyphIterator->next()) {
         Offset pairSetTableOffset = SWAPW(pairSetTableOffsetArray[coverageIndex]);
         PairSetTable *pairSetTable = (PairSetTable *) ((char *) this + pairSetTableOffset);
+        le_uint16 pairValueCount = SWAPW(pairSetTable->pairValueCount);
         le_int16 valueRecord1Size = ValueRecord::getSize(SWAPW(valueFormat1));
         le_int16 valueRecord2Size = ValueRecord::getSize(SWAPW(valueFormat2));
         le_int16 recordSize = sizeof(PairValueRecord) - sizeof(ValueRecord) + valueRecord1Size + valueRecord2Size;
         LEGlyphID secondGlyph = glyphIterator->getCurrGlyphID();
-        const PairValueRecord *pairValueRecord =
-            findPairValueRecord((TTGlyphID) LE_GET_GLYPH(secondGlyph), pairSetTable->pairValueRecordArray, SWAPW(pairSetTable->pairValueCount), recordSize);
+        const PairValueRecord *pairValueRecord = NULL;
+
+        if (pairValueCount != 0) {
+            pairValueRecord = findPairValueRecord((TTGlyphID) LE_GET_GLYPH(secondGlyph), pairSetTable->pairValueRecordArray, pairValueCount, recordSize);
+        }
 
         if (pairValueRecord == NULL) {
             return 0;