diff --git a/src/pathops/SkOpAngle.cpp b/src/pathops/SkOpAngle.cpp
index 36c0dd9..ac596fd 100644
--- a/src/pathops/SkOpAngle.cpp
+++ b/src/pathops/SkOpAngle.cpp
@@ -809,7 +809,7 @@
 }
 
 bool SkOpAngle::oppositePlanes(const SkOpAngle* rh) const {
-    int startSpan = abs(rh->fSectorStart - fSectorStart);
+    int startSpan = SkTAbs(rh->fSectorStart - fSectorStart);
     return startSpan >= 8;
 }
 
diff --git a/src/pathops/SkOpSegment.cpp b/src/pathops/SkOpSegment.cpp
index fc32643..a52ef4a 100644
--- a/src/pathops/SkOpSegment.cpp
+++ b/src/pathops/SkOpSegment.cpp
@@ -1479,7 +1479,7 @@
     int deltaSum = SpanSign(start, end);
     *maxWinding = *sumMiWinding;
     *sumWinding = *sumMiWinding -= deltaSum;
-    SkASSERT(!DEBUG_LIMIT_WIND_SUM || abs(*sumWinding) <= DEBUG_LIMIT_WIND_SUM);
+    SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(*sumWinding) <= DEBUG_LIMIT_WIND_SUM);
 }
 
 void SkOpSegment::setUpWindings(SkOpSpanBase* start, SkOpSpanBase* end, int* sumMiWinding,
@@ -1498,8 +1498,8 @@
         *oppMaxWinding = *sumSuWinding;
         *oppSumWinding = *sumSuWinding -= oppDeltaSum;
     }
-    SkASSERT(!DEBUG_LIMIT_WIND_SUM || abs(*sumWinding) <= DEBUG_LIMIT_WIND_SUM);
-    SkASSERT(!DEBUG_LIMIT_WIND_SUM || abs(*oppSumWinding) <= DEBUG_LIMIT_WIND_SUM);
+    SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(*sumWinding) <= DEBUG_LIMIT_WIND_SUM);
+    SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(*oppSumWinding) <= DEBUG_LIMIT_WIND_SUM);
 }
 
 void SkOpSegment::sortAngles() {
@@ -1774,8 +1774,8 @@
 bool SkOpSegment::UseInnerWinding(int outerWinding, int innerWinding) {
     SkASSERT(outerWinding != SK_MaxS32);
     SkASSERT(innerWinding != SK_MaxS32);
-    int absOut = abs(outerWinding);
-    int absIn = abs(innerWinding);
+    int absOut = SkTAbs(outerWinding);
+    int absIn = SkTAbs(innerWinding);
     bool result = absOut == absIn ? outerWinding < 0 : absOut < absIn;
     return result;
 }
diff --git a/src/pathops/SkOpSpan.cpp b/src/pathops/SkOpSpan.cpp
index 5c89c73..df3ef3c 100755
--- a/src/pathops/SkOpSpan.cpp
+++ b/src/pathops/SkOpSpan.cpp
@@ -369,7 +369,7 @@
         this->globalState()->setWindingFailed();
         return;
     }
-    SkASSERT(!DEBUG_LIMIT_WIND_SUM || abs(oppSum) <= DEBUG_LIMIT_WIND_SUM);
+    SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(oppSum) <= DEBUG_LIMIT_WIND_SUM);
     fOppSum = oppSum;
 }
 
@@ -379,6 +379,6 @@
         this->globalState()->setWindingFailed();
         return;
     }
-    SkASSERT(!DEBUG_LIMIT_WIND_SUM || abs(windSum) <= DEBUG_LIMIT_WIND_SUM);
+    SkASSERT(!DEBUG_LIMIT_WIND_SUM || SkTAbs(windSum) <= DEBUG_LIMIT_WIND_SUM);
     fWindSum = windSum;
 }
diff --git a/src/pathops/SkPathOpsDebug.h b/src/pathops/SkPathOpsDebug.h
index ee2c291..969a990 100644
--- a/src/pathops/SkPathOpsDebug.h
+++ b/src/pathops/SkPathOpsDebug.h
@@ -9,6 +9,8 @@
 
 #include "SkPathOps.h"
 #include "SkTypes.h"
+
+#include <stdlib.h>
 #include <stdio.h>
 
 #ifdef SK_RELEASE
diff --git a/src/pathops/SkPathOpsTypes.cpp b/src/pathops/SkPathOpsTypes.cpp
index c3de93a..bf43c14 100644
--- a/src/pathops/SkPathOpsTypes.cpp
+++ b/src/pathops/SkPathOpsTypes.cpp
@@ -160,7 +160,7 @@
         return a == b ? 0 : SK_MaxS32;
     }
     // Find the difference in ULPs.
-    return abs(floatIntA.fSignBitInt - floatIntB.fSignBitInt);
+    return SkTAbs(floatIntA.fSignBitInt - floatIntB.fSignBitInt);
 }
 
 // cube root approximation using bit hack for 64-bit float