diff --git a/src/common/php_API.pir b/src/common/php_API.pir
index 544fc26..859839d 100644
--- a/src/common/php_API.pir
+++ b/src/common/php_API.pir
@@ -62,7 +62,7 @@ php_API.pir - PHP API Library
     .param pmc val
     .param string type
 
-    $I0 = isa val, 'PippResource'
+    $I0 = isa val, 'PhpResource'
     if $I0 goto L1
     $P0 = getinterp
     $P1 = $P0['sub'; 1]
@@ -325,7 +325,7 @@ STILL INCOMPLETE (see parse_arg_impl).
     .return ('boolean')
   not_boolean:
     unless c == 'r' goto not_resource
-    $I0 = isa arg, 'PippResource'
+    $I0 = isa arg, 'PhpResource'
     if $I0 goto L5
     $I0 = isa arg, 'PhpNull'
     unless $I0 goto L51
diff --git a/src/common/php_MACRO.pir b/src/common/php_MACRO.pir
index 1681359..3459139 100644
--- a/src/common/php_MACRO.pir
+++ b/src/common/php_MACRO.pir
@@ -111,7 +111,7 @@ php_MACRO.pir - PHP API macros
 =cut
 
 .macro RETURN_RESOURCE(val)
-    new $P0, 'PippResource', .val
+    new $P0, 'PhpResource', .val
     .return ($P0)
 .endm
 
diff --git a/src/common/php_builtin.pir b/src/common/php_builtin.pir
index d072f47..7142d57 100644
--- a/src/common/php_builtin.pir
+++ b/src/common/php_builtin.pir
@@ -100,7 +100,7 @@ STILL INCOMPLETE.
     if $I0 goto L4
     $I0 = isa $P2, 'PhpBoolean'
     if $I0 goto L4
-    $I0 = isa $P2, 'PippResource'
+    $I0 = isa $P2, 'PhpResource'
     if $I0 goto L4
     $I0 = isa $P2, 'PhpNull'
     if $I0 goto L4
@@ -426,7 +426,7 @@ Get the resource type name for a given resource
     .RETURN_NULL()
   L1:
     $P1 = shift args
-    $I0 = isa $P1, 'PippResource'
+    $I0 = isa $P1, 'PhpResource'
     if $I0 goto L2
     error(E_WARNING, "Supplied argument is not a valid resource handle")
     .RETURN_FALSE()
diff --git a/src/common/php_gmp.pir b/src/common/php_gmp.pir
index 339f3e9..b4b6c28 100644
--- a/src/common/php_gmp.pir
+++ b/src/common/php_gmp.pir
@@ -348,7 +348,7 @@ Gets signed long value of GMP number
     .RETURN_NULL()
   L1:
     $P1 = shift args
-    $I0 = isa $P1, 'PippResource'
+    $I0 = isa $P1, 'PhpResource'
     unless $I0 goto L2
     .local pmc gmpnum
     gmpnum = fetch_resource($P1, GMP_PMC)