diff --git a/Sources/Plasma/NucleusLib/pnEncryption/plRandom.h b/Sources/Plasma/NucleusLib/pnEncryption/plRandom.h
index 177ce4c5..ba2172a1 100644
--- a/Sources/Plasma/NucleusLib/pnEncryption/plRandom.h
+++ b/Sources/Plasma/NucleusLib/pnEncryption/plRandom.h
@@ -83,7 +83,7 @@ inline float plRandom::RandNorm() const
 inline int plRandom::Rand() const
 {
 #ifndef FAST_Q
-    register int temp;
+    int temp;
     fSeed = fSeed * 1103515245 + 12345;
     temp = (int)((fSeed/65536)&32767);
     return (temp);
diff --git a/Sources/Plasma/PubUtilLib/plFile/plEncryptedStream.cpp b/Sources/Plasma/PubUtilLib/plFile/plEncryptedStream.cpp
index b3ba4a99..f6452d53 100644
--- a/Sources/Plasma/PubUtilLib/plFile/plEncryptedStream.cpp
+++ b/Sources/Plasma/PubUtilLib/plFile/plEncryptedStream.cpp
@@ -88,7 +88,7 @@ plEncryptedStream::~plEncryptedStream()
 //
 void plEncryptedStream::IEncipher(uint32_t* const v)
 {
-    register uint32_t y=v[0], z=v[1], sum=0, delta=0x9E3779B9, n=32;
+    uint32_t y=v[0], z=v[1], sum=0, delta=0x9E3779B9, n=32;
 
     while (n-- > 0)
     {
@@ -102,7 +102,7 @@ void plEncryptedStream::IEncipher(uint32_t* const v)
 
 void plEncryptedStream::IDecipher(uint32_t* const v)
 {
-    register uint32_t y=v[0], z=v[1], sum=0xC6EF3720, delta=0x9E3779B9, n=32;
+    uint32_t y=v[0], z=v[1], sum=0xC6EF3720, delta=0x9E3779B9, n=32;
 
     // sum = delta<<5, in general sum = delta * n
 
diff --git a/Sources/Plasma/PubUtilLib/plFile/plSecureStream.cpp b/Sources/Plasma/PubUtilLib/plFile/plSecureStream.cpp
index 25d47a8c..40350191 100644
--- a/Sources/Plasma/PubUtilLib/plFile/plSecureStream.cpp
+++ b/Sources/Plasma/PubUtilLib/plFile/plSecureStream.cpp
@@ -111,8 +111,8 @@ plSecureStream::~plSecureStream()
 
 void plSecureStream::IEncipher(uint32_t* const v, uint32_t n)
 {
-    register unsigned long y=v[0], z=v[n-1], e, delta=0x9E3779B9;
-    register unsigned long q = 6 + 52/n, p, sum = 0;
+    unsigned long y=v[0], z=v[n-1], e, delta=0x9E3779B9;
+    unsigned long q = 6 + 52/n, p, sum = 0;
 
     while (q-- > 0)
     {
@@ -132,8 +132,8 @@ void plSecureStream::IEncipher(uint32_t* const v, uint32_t n)
 
 void plSecureStream::IDecipher(uint32_t* const v, uint32_t n)
 {
-    register unsigned long y=v[0], z=v[n-1], e, delta=0x9E3779B9;
-    register unsigned long q = 6 + 52/n, p, sum = q * delta;
+    unsigned long y=v[0], z=v[n-1], e, delta=0x9E3779B9;
+    unsigned long q = 6 + 52/n, p, sum = q * delta;
 
     while (sum > 0)
     {
diff --git a/Sources/Plasma/PubUtilLib/plTransform/mat_decomp.cpp b/Sources/Plasma/PubUtilLib/plTransform/mat_decomp.cpp
index 73c275e2..d7257071 100644
--- a/Sources/Plasma/PubUtilLib/plTransform/mat_decomp.cpp
+++ b/Sources/Plasma/PubUtilLib/plTransform/mat_decomp.cpp
@@ -145,7 +145,7 @@ gemQuat Qt_FromMatrix(HMatrix mat)
      * Otherwise, the largest diagonal entry corresponds to the largest of |x|,
      * |y|, or |z|, one of which must be larger than |w|, and at least 1/2. */
     gemQuat qu;
-    register double tr, s;
+    double tr, s;
 
     tr = mat[X][X] + mat[Y][Y]+ mat[Z][Z];
     if (tr >= 0.0) {