diff --git a/data/supported-extensions b/data/supported-extensions
index 6607058..42eff12 100644
--- a/data/supported-extensions
+++ b/data/supported-extensions
@@ -3,6 +3,7 @@ apcu 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2
 apcu_bc 7.0 7.1 7.2 7.3 7.4
 ast 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2
 bcmath 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2
+bitset 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2
 blackfire 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2
 bz2 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2
 calendar 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2
diff --git a/install-php-extensions b/install-php-extensions
index 1d678ea..e878ba1 100755
--- a/install-php-extensions
+++ b/install-php-extensions
@@ -2518,6 +2518,13 @@ installRemoteModule() {
 				fi
 			fi
 			;;
+		bitset)
+			if test -z "$installRemoteModule_version"; then
+				if test $PHP_MAJMIN_VERSION -le 506; then
+					installRemoteModule_version=2.0.4
+				fi
+			fi
+			;;
 		blackfire)
 			case $(uname -m) in
 				i386 | i686 | x86)